Fit for 33-Degree Stairs: These 33-degree beveled angle washers are specifically designed to be placed between the cable railing kit and the end post on 33-degree staircases. These washer holes are 23/64Inch (9mm) and max for 5/16Inch (8mm) thickness cable railing hardware kit. They can be used in combination with our 8mm thick terminals: B0CPKZZJRW Size & Compatibility: Angle washers designed with an inside diameter of 0.35Inch (9mm), and an outside diameter of 0.63Inch (16mm). The package comes with 24 pieces of 33-degree angled beveled washers, which are perfect for an invisible system kit to get a professional and finished appearance staircase project. Marine Grade SST316 Material: Our beveled angle washers are made from marine-grade SST316 material, which has super strong ability on rust resistance and corrosion resistance, and it's able to resist heavy weather. Rest assured, they will not rust even after 10 years of use. Easy Installation: These washers are designed for beveled angles, and will not get deformed easily thanks to their sturdy structures. Additionally, they are extremely beginner-friendly and can be easily installed, making them perfect for anyone attempting a clean and neat cable railing project as a DIY endeavor. Wide Application: The 33-degree design of the washer is perfect for most standard stairways, and can be used with a stainless steel invisible receiver and wire rope. Also compatible with wood, steel, and aluminum post-on-deck railings for versatile application options. Colour:Silver Material:Stainless steel Package Contents: 1set * cable railing hardware Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.