PDTech is a USA shipper only. Shipping typically arrives in 2-4 days in continental US. | Shipping charge is applied once for multiple items. Weight will increase shipping cost a small amount. | Enter custom length in the customize now box in mm. | Typically used with LMx and LMxUU ball bearings, precision ground diameter for low positional error to G6 tolerance | C45 or GCr15 tool steel, hardened to Rc 58-62 for long term durability and chrome plated to resist rust.