QWORK 4 Pack 3" Heavy Duty Garage Door Pulley Kits, 4 Pcs Sheave Pulleys, 2 Pcs Clevis Forks, 4 Pcs Bolts and Nuts Kit, 3/8" Arbor 200LB Load, Extension Spring Pulley Wheel

Heavy duty strong material: Durable steel construction, heat treatment, strong bearing capacity, the garage door pulley system has a load rating of 200 lbs and is suitable for doors up to 400 lbs.. Smooth Sliding: Designed to repair or replace damaged parts of old, worn, noisy and jumping doors. with 9 ball bearing center race and factory pre-lubricated for smooth sliding, provides quiet, smooth and pleasant door opening/closing.. Universal Size: The 3"" pulley has a 3/8"" hole and 3/8"" cable duct, accepts traction cables or belts up to 5/16"" diameter, fits most common garage doors.. Tips: Professional installation is recommended. If DIY, remember to always wear safety gear, use proper tools, and install properly.