Nylon Roller Bearings 0840UU 8mm Groove Guide Pulley Sealed Rail Groove Ball Bearing Wheel

Specifications: Inner Diameter: Approx. 8mm 0.3in Outer Diameter: Approx. 40mm 1.6in Thickness: Approx. 20.5mm 0.8in Groove Width: Approx. 17.5mm 0.7in Grrove Deepness: Approx. 5mm 0.2in Quantity: 1pc Package included: 1 x Groove Guide Pulley Sealed Rail Ball Bearing .This u groove pulley is widely used in doors and window to track and drive mechanical equipment. Nylon roller bearings have good physical, mechanical and chemical properties, especially have great wearresistance. The practical bearing can reduce the friction with the wheel, so it can be used more smoothly and flexibly, and it can achieve great mobility. This u groove pulley is made of high quality material, these pulleys are durable, sturdy and wearable. This u groove pulley internal has lubrication grease, smooth operation, good muted effect.