Product Name: Roller Block Model NO.: GZD Trademark: Yigong Transport Package: Rust Protected and Packed for Over Sea Specification: GZD15*53, GZD20*70, GZD30*123, GZD40*132 Origin: China Nanjing Product Description The roller guide block is consisted of block, roller and recirculator. The rollers are doing infinite circulation motion in the block which is hardened and precision ground. To prevent the roller run out from the block, rollers are designed as step roller and block designed with special slot, which made the rollers have centering automatically by moving to avoid side moving. It is in favor of motion flexibly under load and has long life.Specs.: GZD15*53, GZD20*70, GZD30*123, GZD40*132