V-Rail Linear Rail - V-Guide VR2-048 for Size 2 V-Wheels - Length: 48" Carbon SteelV Rail Linear Rail, 48" long, matching Size 2 V wheels (these are 30mm diameter roller bearings sold separately). This v groove rail is part of PBC Linears V Guide series. Constructed from induction hardened 1045 carbon steel, it is ground and polished for a high quality surface that minimizes friction and wear. Simple installation with a shoulder for precise mounting. The dual row angular contact design enhances load capacity for reliable high speed