Louvolite Vogue and Slim-line 127mm (5") carrier trucks in pre-linked sets of 10. This Fast track design with cutaway channel to carry the draw cord makes for easy and simple re-assembly. Alternative to standard cord through design. These are Top Quality units with Stainless Steel links. If replacing these units for enclosed cord through trucks you will require the Owl & Elephant (Cord Lock) to terminate the cords unless you re-use one of your original trucks as the lead truck.