FB wall duct system material: PVC, hard - flame retardant, normal impact, UV-stabilized Delivery: channel base with base perforation and continuous rail for mounting the device. Package includes lower and upper part and four GGK retaining clips per 2 m delivery length Standard length: 2 m - special lengths up to 7.5 m special colors and special finish (RAL) on request FB 6 x 23 color: light gray Dimensions (H x W): 62 x 23 mm Type: FB 6 X23 LG item: 2 MTR