Product Description: -O-Rings are measured by ID (Inner Diameter) and CS (Cross-Section-Thickness) in Millimeters and then in Inches. -Replacement O-Rings for multi purpose use for Home, Outdoor, Automotive, Plumbing, and many other applications. -Must have in order to replace damaged, broken seal, defective O-Rings and to make sure seal is snug and perfect to fix leaks. -Provides a pressure and fluid seal between cylindrical shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. -High Quality and Very Durable NBR 70 (Nitrile Butadiene Rubber) Shore 70 Material. -Great chemical resistance to Mineral Oils, Greases, Water, Abrasion and Tearing O-Rings Only ! Other Parts or items not included!