1、Improve machine efficiency, save energy, and use it in combination with linear bearings to support or drive. 2、Using high strength aluminum alloy material, good quality, safe, durable and practical. 3、The bearing is a self aligning bearing block bearing, you can easily adjust or replace the bearing. 4、Rhombus flange base, anti rust, durable, long life, excellent performance, smoothly move, low friction. 5、Suitable for large automatic transmissions, industrial robots, plastic machinery, fitness equipment, printers, woodworking machinery, etc. 2 x Rod Rail Guide Support  Item Type: Rod Rail Guide SupportCommodity Material: Aluminum AlloyModel: SHF30Length: Approx. 80mm / 3.1inAperture: Approx. 30mm / 1.2inMounting Hole Diameter: Approx. 9mm / 0.4inLocking Bolt: M6Center Distance of Mounting Hole: Approx. 65mm / 2.6inUses: Suitable for Large Scale Automatic Transmissions, Industrial Robots, Plastic Machinery, Fitness Equipment, Printers, Woodworking Machinery, Ultrasonic Cleaning Equipment, Solar Auxiliary Equipment, Clothing Auxiliary Equipment, Etc.