Semi enclosed type, move flexibly, low noise, easy installation.Suitable for using in reciprocating motion of the occasion, is able to inbuilt cable, tubing, water pipes, etc.Used broadly as an element and service elements in CNC mechanical device tools, digital equipment, counting devices, equipment and electrical machines, etc. Product Name : Cable Drag ChainMaterial : PlasticInternal Size : 18 x 37mm/0.7" x 1.5" (H*W)External Size : 23 x 47mm/0.9" x 1.9" (H*W)Total Length(Approx.) : 1M/39.4"Color : BlackWeight : 380gPackage Content : 1 x Cable Drag ChainNote:Light capturing and diverse reveals could cause the color of the article in the photograph slightly varied from the genuine thing.The dimension allowed error is +/-1-3 cm.