Easy- Snap Fit Diffuser. Paintable Extrusion for Discreet Uplighting. Available in 1m or 2m LengthsExternal Cross Section: 45 x 25mm Internal Cross Section: 20 x 18mm Diffuser Visible Width: 23mm. Extruded aluminium h-shape section profile with clip in diffuser for LED tape installation. When screwed to a wall- this profile can be painted if required and with its vertical diffuser is well-suited to creating a linear uplighter.. led strip profile-led strip fixing-led tape profile