Hillman 1/2 in. O.D x 5/16 in. I.D x 3/32 in. Thickness Neoprene 'O' Ring (12-Pack)

O-rings are one of the simplest, yet most engineered, precise, and useful seal designs ever developed. O-rings are ideal for myriad applications. DIY projects, plumbing services, and contracting work are made easier with Hillman O-rings. Sizes are specified by the inside diameter and the cross section diameter (thickness).