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About product and suppliers:
        Alibaba.com offers 120 30mm locking caster products. About 20% of these are furniture casters, 13% are material handling equipment parts. 

A wide variety of 30mm locking caster options are available to you, such as free samples. 

There are 40 30mm locking caster suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 30mm locking caster respectively. 

0mm locking caster products are most popular in North America, South America, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 16 with ISO9001, 4 with Other, and 2 with ISO14001 certification.