Inside diameter= 1/4inch/6.6mm, Outside diameter= 5/8inch=16mm, Angle = 30 Degree. Suitable for 1/8inch and 3/16inch wood/metal cable railing kit.This angle beveled washer is made of Stainless steel, which is , rustproof, anti-, and to extreme weather.30-degree stainless steel angled beveled washers are designed for termination on end posts that have angled, or offset holes on stair railings, suitable for short and long stud terminals, and even for tuner terminals. these stainless steel angled beveled washers are suitable for indoor or outdoor cable railing.30-degree angled washers are easy to install for beginners, you can DIY your stair railing to more professional and beautiful.10 Pack 30 Degree Angle Beveled Washer. You can use it with the corresponding cable railing kit.Colour:silverMaterial:Stainless steelPackage Contents:1 set x Beveled Washer