Easy Fit Clip-In Diffusers. Paintable Extrusion for Hidden Lighting. For use with 1 or 2 Different LED Tapes. Available in 1m or 2m LengthsExternal Cross Section: 49 x 17mm Internal Cross Section: 12 x 5mm (Each Side) Diffuser Visible Width: 14mm (Each Diffuser). Extruded aluminium symmetrical profile for LED tape installation. Supplied with 2 clip in diffusers- end caps and clips for mounting onto ceilings or walls. Fully assembled- the profile provides 2 covered carriers for LED tape- providing up and down lighting or 2-way lateral lighting.. led strip profile-led strip fixing-led tape profile