Specification - Configuration: U-shape or V-shape by your choice - Material: Aluminum, Plastic (covers) - One aluminum duct length: 1m / 3.3 ft - Cover: milky white - Channel: EXTRUDED aluminum(U-shape: Black, V-shape:Silver) - LED strip width (max): 10 mm Package Included: 6 x Aluminum Channel 12 x End Caps 12 x Silver Buckle 12 x Green Expansion Tube 12 x Self Tapping Screw(Free Gift) Note: Due to different producing batches, product details might be a little different. If you mind the difference, please buy it carefully. Please allow 0-3 CM differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Kelvenix 6 Pack LED Aluminium Channel Profile Extrusion Diffuser in White