Product Overview O-Ring Imperial 18 x 1/4 NBR Includes: 1 x O-Ring Imperial 18 x 1/4 NBR Specifications: Inside Diameter: 18 inchOutside Diameter: 18-1/2 inchCross Section : 1/4 inchMaterial:Nitrile Buna Rubber Durometer:70 Reviews (No reviews yet) Write a Review