NEW LOT of 2 Rare Hiwin Block Carriages Slides w/ rails # HGW 15CC 140H61 1500HF USA SHIP rails are 4 inches long . These blocks look exact same and are both HGW15CC, but the second number is different. I don't understand HiWin numbering systems This is awesome. These are two linear guide blocks to use on your machines. This is s SUPER RARE model number on these. You want these. They have never been used - we took these off a lamination machine that was never used. FREE USA SHIP.