- Set of 4 retractable leveling casters with threaded spindle - Each wheel supports up to 250 kg; the set supports up to 1000 kg - Made of high-quality steel, wear-resistant nylon, and NBR base - 360° swivel casters with top plate ball bearings for flexible movement and rotation - Height adjustable via anti-vibration foot, allowing equipment to be immobilized or moved on uneven surfaces - Dimensions: spindle diameter 12 mm, spindle height 25 mm, wheel diameter 50 mm, total height 8.9-9.5 cm, length 11.5 cm - Color: white - Package includes: 4 wheels mounted on the axle, 4 nuts, 4 threaded rods, and 4 washers - Recommended for use on workbenches, heavy machinery equipment, kitchen islands, welding tables, and other industrial applications