External Cross Section: 18 x 6mm Internal Cross Section: 15 x 4mm Minimum Bending Radius: 15mm. Extruded aluminium profile with arched push-fit diffuser- which is bendable to a radius as small as 50mm. Supplied with end caps and mounting clips to create a tailored LED tape installation along straight or curved edges and surfaces.. led strip profile-led strip fixing-led tape profile