1. SpecificationPackage includes: 5 Pack Rollers. Roller Diameter 38mm(1.5 inch) Shaft Diameter: 12mm(1/2 inch)Load: 1565kg/40130lbs. Need to handle more weight? Place rollers at closer spacing, and our rollers will tackle the task without compromising efficiency. 2. Stainless Steel RollersConstructed of stainless steel, rustresistant, waterproof, smooth and durable. These rollers operate quietly and produce minimal vibrations ensuring smooth and efficient operation. 3. Easy to InstallSpringretained for easy assembly. Simply push the spring in or pull from the other side to fit the roller into the conveyor frame effortlessly. Quick installation and disassembly for your roller conveyor system. 4. sThe steel rollers can be used as rollers or conveyor replacement rollers for roller stands in woodworking, saw stands, material stand rollers, boat rollers, dock rollers, rollers for unloading and loading kayaks, sports bike tire rollers, transfer tape rollers. They can also be used as fence rollers or deployed as part of a fence kit.