Different sizes O ring kits Ideal design for your usage. Fast delivery and best serves. Free modification for molding. 1.Item name:O ring kits2.Size:we can make according to your design.3.Material:EPDM,Silicone,NR,NBR,Viton,SBR,also our engineer can make material according to your request.4.Molding and sample time is about 10days.5.Colour:Black,Silver,Red,Green,Brown,Terra-cotta,Blue,yellow6. ...