Package list: Each set contains :. A)2 pcs track bar B)24 pcs screws Specification Material: aluminum alloy 6063. Color: blue Size: 48" length x 3/4" width x 3/8" depth per track. Treatment: Aluminum Extrusion -Fine Sandblast blue Anodized . Features : A unique double-cut profile with an inside groove. Easy to install Each track is equipped with predrilled mounting holes for simple installation Unlimited uses The track is well accurate, smooth, rounded and ground.So Multiple lengths available, you can connect track to meet the length you want. Easily slide your machine back and forth after use the T-Track. It can let worker more safety and satisfaction. So you’ ll find these to be the perfect workstation enhancing accessory.