caro Ritenere alga marina o ring 4mm congratulazioni registratore di cassa sospetto
40mm x 4mm (48mm OD) Nitrile O-Rings – Totally Seals
O-Ring Staal/Vernikkeld 30 x 4mm
Amazon.co.jp: DINGGUANGHE CS2.4mm Silicone O-Ring OD 43/45/47/49/48/51/50 * 2.4mm Japanese VMQ Gasket Seal Thickness 2.4mm 50PCS White Red Rubber Japanese Gasket, Ring (Size OD43x2.4mm Red) : Industrial & Scientific
4x0.5 Oring 4mm Id X 0.5mm Cs Fkm Fpm Fluorocarbon Nbr Nitrile O Ring O-ring Sealing Rubber - Oil Seals & Other Seals - AliExpress
Amazon.co.jp: White Silicone O-Ring Seal Thickness 4mm Food Grade Rubber O-Ring Seal Gasket Washer OD 25/27/28/29/30/32/33/34mm (Color : 29x21x4mm, Size : 200pcs) : Industrial & Scientific