Euramtec's Small Grille Air Diffuser is ideal for many custom ventilation systems.  Easily installs with 2 self-tapping screws (not included).  Made from durable ABS plastic for strength and temperature resistance.  Air flow area is approx. 1,000 sq. mm.

Overall dimensions are 3.96" x 1.42", with a 0.28" depth (101mm x 36mm, with a 7mm depth). Cutout hole is 3.19" x 1.10" (81mm x 28mm).