Description: [Quality material]: This gym pulley block is made of quality plastic and metal materials, which are sturdy; wear , and not easy to deform. It can be used repeatedly for a long time [Easy to install]: This fixed pulley wheel can be easily installed on the fitness equipment rack. It Is Easy to install and the pulley runs smoothly [Flexible use]: This rack mounted swivel pulley features a rotatable design that allows you to adjust according to different fitness methods, making it a great accessory for your workout routine [Appropriate size]: The square tube hole diameter of this DIY fitness pulley is 25 mm; the square tube thickness is between 50 mm and 80 mm. Its compact structure and design save space [Wide application]: These strength training attachments are nice for cable machines, home workouts, strength training, and other scenarios Specification: Size Chart: Square Tube Hole Diameter 2.5cm/0.98inch Square Tube Thickness 5cm-8cm/1.97inch-3.15inch Color: Black Material: Plastic+Metal Package Contents: 1 Set of Gym Pulley Block 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.