Used for in-line transition from round pipe or insulated flexible duct to a register or grille. 30 ga.

Imperial Wall Register Boot, Angle: 90 deg, Material Gauge: 30 ga, Steel, Galvanized, 13.319 in L, 10 in W, 8.266 in H

Imperial Wall Stack Boot, Galvanized, 3-1/4 in L, 10 in W

Used for in-line transition from round pipe or insulated flexible duct to a register or grille. 30 ga.

Used for right angle transition from round pipe or insulated flexible duct to a register or grille.

Used for right angle transition from round pipe or insulated flexible duct to a register or grille.

Used to change the horizontal direction of two sections of rectangular stack duct. 30 ga.

Used between wall studs for venting, heating and air conditioning supply and return duct.