Made from solid galvanized steel and dual nylon rollers Maximum capacity 2-5/16 inches, overall stand dimensions: 2.4 inches high x 5.7 inches wide; roller diameter: 1.2 inches Easily installs on the stud and secures with 1/2inch bolts Perfect for your garden sliding gates and patio fences. Reinforces and prevents sliding doors from falling off tracks Sliding door guide wheels with L-post bracket are suitable for most sliding door types and fences, please make sure your door width is less than 2-5/16 inches before placing your order Quantity:2PCS Colour:Metallic & White Material:Metal+nylon Package Contents: 2 * Guide wheel 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.