... 4.Color:white Product Name: Single Nylon pulley wheel PU-55/08-30, Black U Groove Wheel (Sport equipment roller, Machine ... roller, Fitness equipment roller)Product Descriptions: 1. Item No.: PU-55/08-302. Material: POM3. Color: White4. Specification: Wheel material POM ... (PA,Nylon,PA66)Wheel Ø 55 mm (D) Wheel width 30 mm (T2) Load capacity 30 ...