Features：
Full double ball raceway hardened with heat treat process for better performance and greater durability.
Wheels feature sealed precision ball bearings to provide a smooth,quiet and maintenance free ride.
Fully integrated thread guards prevent the pick-up of strings.
Non-marking.
Address：Colson Caster Guangzhou Ltd.3 Yongshun Boulevard,Yonghe, GETDD,Guangzhou,Guangdong,China
Office:+86(020) 32853807
Fax：020-82972171
E-mail：marketing@colsonchina.com
Scan,focus on wechat
