1.good wear resistance 2.Good elasticity 3.High precision, high concentricity 4. ... , Needle, Sintered Bronze, PlasticWarranty6 months ~ 12 monthsSpecial Feature:1. good wear resistance2. high precision, can be within 2ddm3. good depth of ... to make sure the precision can match our customers' needs Long life PU roller wheels with aluminum core, good ...