Atoplee 225pcs O Ring Kit O-Ring Metric Rubber Grommets Assortment Kit 18 Size Assortment Kit SAE Pneumatic Air Rubber Hydraulic Tool Paintball Set Material: rubber, No pollution, no radiation, no abnormal smell, environmental friendly Total number: 225pcs, 100% brand new and good quality Size:18 popular sizes, Wear-resistant and corrosion resistant Package material: re-sealable plastic case It is suitable for car, door, window, electric appliance, bearing, pump, carrier roller