Gravity Caster, is also well known as NingBo Best Polyurethane Co., Ltd, is now located in Tonglu,Hangzhou, The mother company,NingBo Best Polyurethane, was founded in 1989, which became one of the leading manufacturers of wheels &casters for every field of application. In the material handling industry, it is famous both in domestic and abroad for its focus on manufacturing ultra-heavy and wear-resistant polyurethane wheels.In recent years, our company has specialized in design and manufacturer of heavy dut wheels and casters, so we gladly introduced Gravity Caster to the public in 2012 with 70,000 square meters new facilities and more than 200 well-trained employees.Gravity is moved by only one goal: Keep Dreams Rolling. For this company philosophy Gravity manufactures everything from scratch to ensure meeting different customers' quality standards, as to continually guarantee the high well as a completing control on delivery dates. All of these allow us to continually guarantee the high Gravity quality standard.