Product size: The outer diameter of this product is 19mm, the inner diameter is 13mm, and the thickness is 0.75mm. Manual measurements, please allow slight errors. Applicability: These washers of this product are deliberately made thin to more accurately install the knob on the back plate. Very suitable for / old / retro / nostalgic / antique / door handle / lever spindle. Easy to install: Direct replacement without adjustment, perfect compatibility and high reliability. Product material: This product is specially designed and made of metal material, with high service life and not easy to damage. Product list: Product include a total of 20pcs Spindle Washers, which can completely meet your daily use needs and replacement., Weight: 0.0220462262 pounds, Manufacturer: ECSiNG