... Plastic;Aluminium; Color:white;brass;blue etc. Product: Copper Ball Bearing (brass ball cage) Material: Brass;Plastic;Aluminium;Color: white;brass; ... manufacture hardware mould componets(such as guide post,guide bushing,ball retainers ,punch etc.)according to MISUMI ,FUTABA,AGATHON,HASCO ... please do not hesitate to contact us!Our factory: Copper Ball Bearing (brass ball cage) for Guide Post Dies Molds