1、This set is manufactured by aluminum material, which is light weight and portable, corrosion resistance, wear resistance and with high ductility. 2、Comes with 2pcs premium springs, with high spring tension ability for easy to use. 3、Standard parts design, easy to change and simple to install. 4、Fine workmanship, with small tolerance ro increase the versatility, easy to maintain. 5、Suitable for STUDER REVOX opener, fine quility belt press accessories. 6、Suitable for A80, A81, A812, A816, A820. This belt press accessories set is manufactured by aluminum material, which is light weight and portable, corrosion resistance, wear resistance and with high ductility. Comes with 2pcs premium springs, with high spring tension ability for easy to use. Suitable for STUDER REVOX opener, fine quility belt press accessories. Suitable for A80, A81, A812, A816, A820. Features: This set is manufactured by aluminum material, which is light weight and portable, corrosion resistance, wear resistance and with high ductility. Comes with 2pcs premium springs, with high spring tension ability for easy to use. Standard parts design, easy to change and simple to install. Fine workmanship,  with small tolerance ro increase the versatility, easy to maintain. Suitable for STUDER REVOX opener, fine quility belt press accessories. Suitable for A80, A81, A812, A816, A820. Specifications: Name: Belt Press Accessories Set Material: aluminum Package size: 105 * 71 * 10mm / 4.13 * 2.80 * 0.39in Package weight: 9g / 0.32ounce Packing List: 2 * Spring 2 * Screw 2 * Belt Press 2 * Spring 2 * Screw 2 * Belt Press