... ,size can be customized 2.rubber ball 3.competitive price,durable in use 4.accept small order Ball caster 1.Available top: stem ... .size:40mm or 50mm3.load:20-25kgsThe color of the ball can be black ,white or other as requestedOur Advantages1) High ... caster, wood caster,pu caster,cast iron cater, nylon caster, ball caster, pneumatic caster ,rubber wheel ,plastic wheel ,pu wheel ,metal ...