Supplied Complete with Installation Accessories. Easy- Snap Fit Diffuser. Available in 1m or 2m LengthsExternal Cross Section: 24 x 11mm Internal Cross Section: 20 x 7mm Diffuser Visible Width: 21mm. Extruded aluminium wide section profile with crowned diffuser and fitting accessories for LED tape installation. Ideal for illuminating furniture and architectural details.. led strip profile-led strip fixing-led tape profile