Material - These round flat washers are made of PVC material, which is insulated and anti-corrosion, durable and has good wear resistance. They have excellent sealing and pressure resistance, not easy to crack or age, ensuring long-term indoor and outdoor applications. Design - Plastic washers' flat design and precise size ensure a snug fit, suitable for tight spaces, its stable structure can prevent screws and bolts from loosening over time. Playing a vital role in reducing friction between fasteners, preventing leakage, isolating components, and resisting loosening. Easy to Use - The flat spacers are effortless to install under the head of a bolt or nut to provide a smooth load-bearing surface, reducing the possibility of fasteners vibrating or loosening due to contact with uneven surfaces. Widely Applicable - These washers are used in fastening applications and are suitable for replacing damaged shower washers on glass shower door handles, old washers on towel bars, and can also be used on faucet pipes, hose bolts, appliance repairs, bathroom renovation projects, automotive and marine industries, etc. Material: PVC; Inner diameter: 6mm/0.24 inch; Outer diameter: 12mm/0.47 inch; Thickness: 0.3mm/0.01 inch; Color: Transparent; In the package of: 150 Pcs x PVC Flat Washers