Package contained:You will get a total of 20 pieces rubber flat washers with a plastic box for storing and selecting,the size of each washer approx 1 1/2 x 1 x 1/8 inch,sufficient quantity can satisfy your family daily need and replace Reliable and Sturdy Material:Our rubber washer is made of quality SBR material,flexible and elastic,reliable and not easy to loose,and it is no need to worry about any scratches during using Excellent workmanship:The hole diameter is precise and the size is very uniform in thickness and diameter,and our rubber is solid and doesn’t just squish when the nut and washer is tightened,it’s effectively reduce to cut down any vibration noise Waterproof and leak-proof:The black rubber washer has a good effect for preventing water leakage,air and any others,you can rest assured so after the installation Widely used:Perfect for spacers,vibration suppression,residential,commercial,industrial,automotive,lighting,mounting,metals,counters,robotics,medical equipment,hobby,industrial and more 20 Pcs Oil Resistant Rubber Washers 1 1/2" OD x 1" ID x 1/8" Thickness Black Neoprene Industrial Flat Rubber Spacer