4-Pack 1 Inch Small Tiny Shopping Cart Wheel Swivel Caster Wheels Soft Rubber TP
4PCSx M6 Threaded Stem Caster Wheels. Each caster capacity is 15kg, total capacity for all 4 casters is 99lb/45kg (calculated by 3 casters ). Because when the ground is uneven, there will be only 3 casters bearing weight.