4Pcs Nylon Coated Guide Pulley Wheel Sealed Roller Bearing Wheel Durable Groove Ball Bearing Doors

Label:Yes This u groove pulley internal has lubrication grease, smooth use, good muted effect. This u groove pulley is made of good material, these pulleys are durable, sturdy and wearable. 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 wear-resistance. 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.

Specifications: Material: Nylon Color: Black Size: 40×20×20mm(1.57×0.79×0.79in) Package included: 4 x Groove Guide Pulley Sealed Rail Ball Bearing