Transition box AST DN90/125, 400 mm. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Transition box AST 2xDN90/125, 400 mm. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Plenum box 1xDN90/125 unregulated. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Plenum box with regulator 2xDN90/125. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Plenum box unregulated 2xDN90/125. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Plenum box straight 1xDN90/125. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

High plenum box for drywall DN90/125. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Plenum box to drywall LOW DN90/125. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Plenum box for drywall 2xDN90/125. DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Linear plenum box 1xDN90 (70 x 270 mm). DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Linear plenum box 1xDN90 (70 x 270 mm). DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.

Linear plenum box 2xDN90 (500 mm). DN90 refers to the 90 mm outside duct diameter; the inside diameter is 75 mm.