Miniature Linear Rail MGN9 and standard linear block MGN9C Material: linear rail is made of GCr15 and linear block is made of 440C stainless steel Length of rails: 55, 75, 95, 115 (distance of end to the last mounting hole 7.5mm), 130, 150, 170, 190, 210, 230, 250, 270, 290, etc MGN9C standard lengt...