1. Steel product standard: China YB/700-88 2. Standard: we manufactures it according to customers' 1. Steel product standard: China YB/700-882. Features: we manufactures it according to customers' necessity. For example, bearing bar pitches may be 12.5, 15, 30, 40, 60, 80 and 90mm, of which 30 and 40mm are recommended. Cross bar pitch may be 30, 38, 50, 76 and 100mm, of which 50 and 100mm are ...