Premium Material: Made of chrome-plated steel and plastic material, sturdy and long-lasting, not easy to break and with exquisite workmanship, and can be used for a long time. Suitable Size: 3/8 inch diameter. The weight lifting machine pin has a wide range of applications and is suitable for most gyms and fitness equipment. Product Feature: Our weight pin can be used to add more weight, are suitable for weight stacking, are easy to use, fit well and perform well. Colour:black and silver Material:Chrome-plated Steel and Plastic Package Contents: 2 x Weight Stack Pin 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.