{"product_id":"displacement-puck-set-of-3","title":"Air Displacement Puck","description":"\u003cp\u003e\u003cb\u003e\u003cu\u003e⚠️ Please measure your cylinder's inner diameter before ordering — see the compatibility table below. ⚠️\u003c\/u\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe puck fills the unused air space above your glans in the cylinder. Less empty volume means faster pressure transitions - there's simply less air to move to reach your target vacuum. It makes a real difference for Milking and RIP, especially with a manual or slower electric pump, and it's most noticeable in larger cylinders with a lot of dead space. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy this one is different\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInspired by Karl's \u003ca rel=\"noopener noreferrer\" title=\"original concept\" href=\"https:\/\/www.reddit.com\/r\/TheScienceOfPE\/comments\/1maiurv\/i_made_a_thing_karls_displacement_puck_making\/\" target=\"_blank\"\u003eoriginal displacement puck concept\u003c\/a\u003e, the PEMods Puck takes the idea further with a fully modular, magnetic system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e• Magnetic - no O-rings\u003c\/strong\u003e. Pucks hold to each other via embedded neodymium magnets. They don't seal (there's a central air channel for airflow), they just hold the stack together and keep it in place.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e• Foolproof stacking.\u003c\/strong\u003e The magnet layout means the pucks only stack the right way, so you can't get it wrong. No dedicated top piece needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e• Easy to remove.\u003c\/strong\u003e Two magnets sit on top of the cylinder and hold the whole stack in place. Take them off and the stack drops right out — no fishing around with a rod, no hook inside the cylinder.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e• Easy to clean.\u003c\/strong\u003e No O-rings means nothing that traps fluid or wears out over time — just pull the stack apart, rinse, done.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e• Labeled.\u003c\/strong\u003e Each puck is printed in black with its size marked in white, so you always know what you've got.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many pucks do I need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMeasure the empty space above your glans at working length - that's the dead volume you want to fill. Stack pucks to take up most of it, but leave around 1 cm \/ 0.4\" of clearance at the top so you're not pressing directly against the stack. Combine 25 mm and 10 mm pucks to fine-tune the height, and include at least one 10 mm puck so you can adjust in small increments.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cu\u003eMinimum order: 3 pucks\u003cbr\u003e\u003c\/u\u003e\u003c\/b\u003e€13.90 per puck\u003cbr\u003e€11.90 per puck on orders of 6 or more\u003cb\u003e\u003cu\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCompatibility \u0026amp; Sizing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCylinder Size \/ Inner Diameter \/ Puck Diameter\u003c\/p\u003e\n\u003cp\u003e2.50 \/ 61.2mm \/ 60.5mm\u003cbr\u003e2.24 \/ 54.9mm \/ 54.2mm\u003cbr\u003e2.125 \/ 52.0mm \/ 51.3mm\u003cbr\u003e2.00 \/ 49.0mm \/ 48.3mm\u003cbr\u003e1.85 \/ 45.3mm \/ 44.6mm\u003cbr\u003e1.73 \/ 42.4mm \/ 41.7mm\u003cbr\u003eValve (all sizes) \/ 10.0 mm\u003c\/p\u003e\n\u003cp\u003eEvery manufacturer uses different tolerances and inner dimensions. The values above are reference measurements only - fit is not guaranteed. Whether a puck fits also depends on factors such as flange design and internal geometry, which vary between cylinders of the same nominal size.\u003c\/p\u003e\n\u003cp\u003eShipping: Europe only. Orders outside Europe cannot be fulfilled at this time.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eIf your cylinder is not listed, or if a puck does not fit despite matching the listed size, please contact us.\u003c\/strong\u003e \u003cstrong\u003eCustom sizes are available on request. (Custom orders are non-refundable).\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMaterial: PLA\u003cbr\u003eColour: Black\u003cbr\u003eAll pucks may have slight dimensional variations of ±0.5 mm. This is inherent to the manufacturing process and does not affect functionality.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Mein Shop","offers":[{"title":"2.50\" | 10mm | 60.5mm","offer_id":57472440729944,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"2.50\" | 25mm | 60.5mm","offer_id":57472440762712,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"2.24\" | 10 mm | 54.2mm","offer_id":57392873701720,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"2.24\" | 25 mm | 54.2mm","offer_id":57392873734488,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"2.125\" | 10mm | 51.3mm","offer_id":57395251609944,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"2.125\" | 25mm | 51.3mm","offer_id":57395249480024,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"2.0\" | 10mm | 48.3mm","offer_id":57393004020056,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"2.0\" | 25mm | 48.3mm","offer_id":57393004052824,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"1.85\" | 10mm | 44.6mm","offer_id":57393004085592,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"1.85\" | 25mm | 44.6mm","offer_id":57393004118360,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"1.73\" | 25mm | 41.7mm","offer_id":57395298337112,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true},{"title":"1.73\" | 10mm | 41.7mm","offer_id":57395308757336,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1348\/4120\/files\/rn-image_picker_lib_temp_75e179aa-72f8-4b89-9bf2-d26af6d1f306.png?v=1781601149","url":"https:\/\/pemods.com\/products\/displacement-puck-set-of-3","provider":"PEMods","version":"1.0","type":"link"}