Miller DuraHoist Confined Space 2-Piece Adjustable Upper Mast Multi-Gas It's small

It's small

It is made of galvanized steel and has a raised lip to help secure the duct

1-90 degree bend: 709 CFM

One 90° Bend - 1500-2500cfm

you buy the UB20 without the quick coupler system

Miller DuraHoist Confined Space 2-Piece Adjustable Upper Mast Multi-Gas It's smallCompatible with any TWO Lower Mast Extensions, not exceeding a combined 90 inch in height. In other words, this upper mast, unlike the One Piece one, can be used with TWO lower masts as long as the total height of the two lower masts does not exceed 90 inches. Or to put another way, the combined height of the two lower masts cannot exceed 90" in height. For example, the 45" and the 57" lower mast can't be used together. Mast offset adjusts from 12