4.5" Exterior 90 (Vertical Outside 90) – Seamless One-Piece Design Upflow clean appearance every time

clean appearance every time

maximum efficiency

Premium Quality: Made from 99

Featuring an enhanced tube-and-fin coil design

Protective Debris Cover – Helps block insulation

4.5" Exterior 90 (Vertical Outside 90) – Seamless One-Piece Design Upflow clean appearance every time4. 5" Exterior 90 (Vertical Outside 90) Seamless One Piece Design The 4. 5" Exterior 90 (Vertical Outside 90) fitting is the perfect solution for creating clean, professional outside corners in HVAC line set cover systems with 4. 5" wide channel lengths. This one piece design clips onto the duct cover for a seamless, screw free look, while its adjustable depth and UV resistant construction ensure a secure, durable fit. For added customization, the