THE STRENGTH YOU NEED: These super heavy duty casters were designed with strength and sturdiness in mind for a long lifespan and easy movement of large, heavy loads. Each caster holds up to a maximum of 900 lbs. or 3600 lbs when purchasing a set of 4 casters. HIGH QUALITY MATERIAL: Our casters are made with a high quality, sturdy material allowing you to move heavy loads with ease and safety. These casters feature maroon pro tech polyurethane material on a Polypropylen Core for a long lifespan, and to keep all floors clean and free of tread marks. Its pro tech polyurethane material and cast iron core also allow it to resist against most chemicals, oils, grease, and water making this caster ideal for a multitude of industrial applications. BUY WITH CONFIDENCE: The satisfaction and safety of our customers is our priority when designing and creating casters. For this reason, we make sure our products are made to the highest standards. Our products are ISO certified, TUV tested, and NSF registered. Our products are leading the industry by offering a 3-Year limited warranty on all our products. RIGID: This is a rigid caster is the excellent choice in applications where linear mobility is required. These casters meant to easily move forwards or backwards, or straight lines. ROLLER BEARINGS: This caster comes with roller bearings with spanner bushing for greater shock resistance, and increased capacity. Roller bearings allow a caster to perform better during impact loading and shock. YOU NEED THEM, WE HAVE THEM! Made with durable and long-lasting pro-tech Polyurethane on a non-marking Polypropylen Core, these 6" x 2" heavy duty casters are designed to move heavy loads in material handling environments with ease and safety. Each caster offers easy and smooth maneuverability of large heavy loads. Each caster holds up to 900 lbs. and each set of 4 holds up to 3600 lbs. Its finely-made pro-tech Polyurethane tread on Polypropylen core is designed to keep all floors clean and tread mark-free, and its roller bearing with spanner bushing helps absorb shocks while simultaneously moving large loads. Our state of the art casters are made to resist against most chemicals, oils, grease, and water in a multitude of industrial applications including mobile storage racks, mobile tool chests, platform carts, warehouse trucks, food industry, and other material handling applications.