About product and suppliers:
            317 black 40mm caster products are offered for sale by suppliers on Alibaba.com, of which furniture casters accounts for 262%, casters accounts for 40%, and material handling equipment parts accounts for 18%. 

A wide variety of black 40mm caster options are available to you, 

There are 1,079 suppliers who sells black 40mm caster on Alibaba.com, mainly located in Asia. The top countries of suppliers are China, Taiwan, China, and Malaysia, from which the percentage of black 40mm caster supply is 99%, 1%, and 1% respectively.