Features Construction for Longevity: Crafted from PVC and 45# steel, these casters are wear-resistant, ensuring silent without damaging your floors or leaving scratch marks Versatile Application for Various Uses: ly suited for flight cases, instrument cases, display equipment, carts, toolboxes, and light machinery, enhancing your mobility needs Ideal for Mobile Workstations: Designed for use with loudspeakers, cabinets, brackets, electrical enclosures, and furniture, making it easy to move heavy items with confidence Simple Installation for Convenience: Easily attach these casters directly to the designated area of your equipment using bolts, streamlining your setup proc without hassle Strong Load Bearing Capacity: The integrated structure of the base provides exceptional strength, making these casters a practical accory for reliable replacement and everyday use Features: 1、PVC + 45# steel casters are wear？resistant, silent and do not damage the ground or leave scratch marks. 2、Widely used in flight cases, instrument cases, display/exhibition equipment, carts, toolboxes, light machinery, equipment racks. 3、Suitable for mobile workstations, loudspeakers, cabinets, brackets, electrical encloses, furniture, etc. 4、Easy to use, can be directly installed on the design part of the main engine with bolts, convenient and simple. 5、Integrated structure of the base with strong load bearing capacity, practical accory for replacement use. Specification: Item Type: Caster Material: PVC + 45# steel Wheel Diameter: Approx. 40mm / 1.57in Wheel Width: Approx. 20mm / 0.79in Bottom Mounting Hole Center Distance: Approx. 45 x 30mm / 1.8 x 1.2in Base Plate Size: Approx. 60 x 44mm / 2.4 x 1.7in Mounting Height: Approx. 62mm / 2.4in Single Wheel Load: 60kg / 132.3lb(approx.) Package List: 4 x Caster Package List 4 x Caster