VXB™ Brand 20mm Linear Aluminum Extrusion Profile 2020 4 Feet Long One Rail 2020 Aluminum Extrusion Profile Linear Rail with Profile 20mm Wide and Rail length is 4 Feet Profile width: 20mm Rail length: 4 Feet Smooth running performance Stiffness strength and accuracy for improved production processes Quantity:One Rail (2020 Aluminum Extrusion Profile)