Buy Legrand Transcab Grey PVC Open Slot Slotted Trunking Slotted Panel Trunking, W25 mm x D60mm, L2m Browse our latest cable-trunkings offers. By LEGRAND. LEGRAND TRUNKING GREY OPEN SLOT 60 x 40MM. Images are shown for illustrative purposes only. With its innovative snap to length design, Transcab open slot panel trunking is quick and easy to install without compromising on quality. Transcab’s durable PVC body consists of 6mm gaps and mm fingers with unique support ribs that provide strength and rigidity.