Brand: FATH Item: Fixed caster Series: 15 Series, 40 Series and 45 Series For Use With: 1.5 x 1.5in, 40 x 40mm and 45 x 45mm T-slotted rails Material: Thermoplastic polyurethane/nylon/steel Color: Silver/gray Manufacturer Part Number: 098F100UN Load Rating: 269 lb/122 kg FATH fixed caster, silver/gray, thermoplastic polyurethane/nylon/steel. For use with 1.5 x 1.5in, 40 x 40mm and 45 x 45mm T-slotted rails. Manufacturer part number: 098F100UN.