uxcell 22mm Pulley Bearing Round Guide Groove Sliding Door Gate Wheel 10pcs Product Name: Sliding Gate Wheel; Material: Metal, Plastic Weight: 90g; Package Content: 10 x Sliding Gate Wheels, Serveral Mounting Parts Main Color: White, Silver Tone Wheel Size: 22 x 9mm/0.87" x 0.35"(D*T) Thread Dia: 4mm/0.16"