• 10 black flat washers in the package. • Outer diameter: 24.5 mm. Inner diameter: 16 mm. Thickness: 3 mm. • The washer is made of rubber, and the filter is made of stainless steel. • High-quality material that allows it to function for a long time. • Suitable for garden hose, faucet, 15 mm water meter, etc. • Filters sand and prevents water leaks. • Confirm the size before purchasing.