Extended Sample Pack
Try before you buy !
Purchase this sample pack and decide which size fits you better.
This "extended edition" will also let the undecided or curious key clackers compare how hard O-rings feel vs softer ones ~
It includes five O-rings of each size (1.5mm / 2.5mm / 3mm) made from silicone and nitrile rubber, respectively with a Shore hardness of 40A and 70A.
Total : 30 pcs