Fixed Pulley: This product features a fixed pulley system, designed to provide smooth and efficient working for your high rowing fitness equipment.Material: Made from quality aluminum alloy, this pulley is sturdy and resistant to wear and tear, ensuring long-term performance.Product Dimensions: With dimensions of 200*90mm, this pulley is compact yet sturdy enough to handle the demands of your fitness equipment.Package Includes: Each package comes with 1 aluminum alloy fixed pulley, fit for DIY enthusiasts who want to customize their own rowing machines.Versatile Use: Designed for 50 or 60mm square tubes, this pulley bracket can be used in a variety of fitness equipment setups, making it an essential component in your home gym or professional fitness center. Specification: Material:? aluminum alloy Size Chart: overall length:20cm/7.87inch pulley length:?9cm/3.54inch Package Includes: A: 1 pulley bracket, FOR 50mm, PP material pulley,0.7kg OR B:1 pulley bracket, FOR 50mm, aluminum alloy material pulley,0.9kg OR C:1 pulley bracket, FOR 60mm, PP material pulley,0.7kg OR?? D:1 pulley bracket, FOR 60mm, aluminum alloy material pulley,0.9kg Note: Please allow slightly errors 1-2cm differences due to manual measurement.