Linear Guideway 7/100mm By Schneeberger, Switzerland 555 001 111 Rail Length 100mm, Width 7mm, Height 4.5mm Rail Length 3.93701 Inch, Width 0.275591 Inch, Height 0.177165 Inch Weight 21.6 Gram Accuracy Class G3, Proload Class V0 Made from through hardened stainless steel