Square Register

The opening dimensions of the wooden frame (inner dimensions) are installed with about 0.2 inches (5 mm) more than the register torso measurement.

Material: ABS resin.

5.9 x 7.9 inches (150 x 200 cm); Effective ventilation area 42.9 inches (1

7.9 x 9.8 inches (200 x 250 mm). Effective ventilation area 7.2 inches (18

Image uses "High Logic Square Register SPRN-150x200"