Supplied Complete with Installation Accessories. Easy- Snap Fit Diffuser. Available in 1m or 2m LengthsExternal Cross Section: 18 x 16mm Internal Cross Section: 12 x 10mm Diffuser Visible Width: 14mm. Extruded aluminium tall 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