Equal T Piece to suit 204mm x 60mm ducting, female connections at each end. The Rectangular Ducting Range is designed to maximize air flow and minimize resistance in a ventilation system. Female fittings on all ends. Equal T Piece to suit 204mm x 60mm ducting, female connections at each end. The Rectangular Ducting Range is designed to maximize air flow and minimize resistance in a ventilation system. Female fittings on all ends.