Quiet, multifunctional, tear-resistant exercise device for Power Racks Sport B racks Description: [Fixed Block]: This product comes with a fixed block system, designed to provide a smooth and efficient operation of your rowing equipment. [Material]: Made from high-quality aluminum alloy, this roller is durable and resistant to wear and tear, ensuring long-lasting performance. [Product Dimensions]: With dimensions of 200*90 mm, this roll is compact but at the same time durable enough to meet the demands of your fitness equipment. [Package Contents]: Each pack includes 1 fixed aluminum alloy roll, perfect for DIY enthusiasts who want to customize their own rowing ergometers. [ Versatile Use]: Designed for 50 or 60mm square pipes, this roller holder can be used in a variety of fitness equipment configurations, making it an essential component of your home gym or professional fitness center. Specification: Material: Aluminum Alloy Size Chart: Overall length: 20 cm/7,87 inch pulley length: 9cm/3,54 inch The package includes: A: 1 pulley bracket, FOR 50 mm pulley, PP material, 0,7 kg OR B:1 pulley support, FOR 50 mm pulley, aluminium alloy, 0,9 kg OR C:1 pulley support, FOR 60 mm pulley, PP material, 0,7 kg OR D:1 pulley support, FOR 60 mm pulley, aluminium alloy, 0,9 kg