About us
Ningbo Best Polyurethane Co., Ltd was established in 1989,which is one of china’s leading casters manufacturers and joint venture enterprise. Today,it is covering an area of 35,000 square meters and more than 200 employees.We own R&D center for research, advanced production line, professional engineers and workers,service for you.Also we have successfully developed a design partnership with our OEM clients. Because of the unique high load capacity, high elasticity, wear and tear resistance of our casters and wheels, we are widely chosen by many customers in Europe, America, Asia and so on.
Reliable—Professional—innovative—It is our consecutive promised and already to be know and recognized by customers all over in worlds. We can make customized parts according to your drawing ,samples and specification. We focus on stable high quality and professional service as well as reasonable price.
With our joint efforts, we have rated "Well-known Trade Mark" and ISO9001.We are constantly expanding our new products to meet the needs of our customers. So please believe Haiyou will be your best Partner and Choice. So please feel free to contact with us if you have any questions. Haiyou welcome you!

On the Road: Gravity is Progressing
Gravity Caster, is also well known as NingBo Best Polyurethane Co., Ltd, is located in Tonglu, Hangzhou, which has been voted as the most beautiful town in China. The mother company, NingBo Best Polyurethane, was founded in 1989, which became one of the leading manufacturers of wheels as well as swivel and fixed castors for every field of application.
In recent years, our company has specialized in design and manufacturer of heavy duty wheels and casters, so we gladly introduced Gravity Caster to the public in 2016 with 60,000 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 well as a completing control on delivery dates. All of these allow us to continually guarantee the high quality Gravity standard.
Service Hotline
Add:No. 1 Dingqiao Road,Jiangshan Town, Ningbo, Zhejiang
E-mail: haian@haiyoucasters.com  
Website: http://www.haiyoucasters.com
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