Red Color Silicone 40A O Ring - China O-Ring, Auto Parts | Made-in-China.com
Miller Electric O-Ring, 30-40A, XT, PK3 249969 | Zoro
Amazon.com: Cherry MX Rubber O-Ring Switch Dampeners Red 40A-L - 0.2mm Reduction (125pcs) : Electronics
MK Pro Rings Silicone Switch Dampening O-rings 40A 3.0mm (120 Pack)
SMC NLP-40A O-Ring (Bag of 2) | eBay
40 O-Rings (10 Pack) - Danco
Rubber Ring Keyboard Switch | Rubber Ring Switch Cherry | Ring Dampeners Keyboard - Gaskets - Aliexpress
Wholesale Mechanical Keyboard Keycap 40A Silicone Rubber O Ring for Cherry Mx - China Wholesale Mechanical Rubber O Ring, Keyboard Keycap Rubber O Ring | Made-in-China.com
Tigri Cherry Mx O-Ring Switch Dampeners (40A - Turquoise) | O ring, Turquoise, Rings
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Captain O-Ring - Rubber Keyboard Switch Dampeners Red [40A-L 0.2mm] (135 pcs) | eBay
https://www.allworldmachinery.com/itemdetail/P-40
Amazon.com: Cherry MX Rubber O-Ring Switch Dampeners Red 40A-L - 0.2mm Reduction (125pcs) : Electronics
X1 Tools R-22 O-Ring (ID: 28 mm, CS: 3.5 mm, OD: 35 mm) (40 O-Rings), 40PK X1E-CON-ORI-RUB-0022x40 | Zoro
125pcs MX Cap Keyboard o ring 40A Switch Dampeners Cherry Rubber o-rings Red / Blue O Ring Replace Part
125pcs MX Cap Keyboard o ring 40A Switch Dampeners Cherry Rubber o-rings Red / Blue O Ring Replace Part
Amazon.com: 200pcs Rubber O-Ring Keyboard Switch Dampeners Make Your Mechanical Keyboard Quieter with Keycap Remover Suitable for Cherry MX Key Kit Dampers 40A-L-0.2mm Reduction (Red) : Electronics
The Best O-Rings For Silencing Your Keyboard - Switch and Click
PTOU-40A | O-Ring Union High Pressure Fitting - Threaded, PTOU Series | Fuji Special | MISUMI
Amazon.com: 200pcs Rubber O-Ring Keyboard Switch Dampeners Make Your Mechanical Keyboard Quieter with Keycap Remover Suitable for Cherry MX Key Kit Dampers 40A-L-0.2mm Reduction (Transparent) : Electronics
Premium 40 O-Ring Roller Chain | 40 O-Ring Chain - 10FT
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Captain O-Ring - Rubber Oring Keyboard Switch Dampeners/Sound Reducers Red [ 40A-L 0.2mm] Reduction (135 pcs w/ screen cloth)
Cherry MX Rubber O-Ring Switch Dampeners Blue 40A-R - 0.4mm Reduction (125pcs) - Walmart.com
Glorious sell 40A/70A O-Rings at both 1.5 and 2.5mm for $10. Thought I'd mention this as usually people only talk about WASD. (link in comments) : r/MechanicalKeyboards
Amazon.com: Rubber Keyboards O-Ring Switch Dampeners Keycap 200Pcs for Cherry MX Key Kit Dampers 40A-L-0.2mm Reduction (Clear)
![Amazon.com: Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [ 40A-R 0.4mm Reduction] (135 pcs w/Screen Cloth) : Electronics](https://m.media-amazon.com/images/I/71QJABh8nWL._AC_UF894,1000_QL80_.jpg "Amazon.com: Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [ 40A-R 0.4mm Reduction] (135 pcs w/Screen Cloth) : Electronics")