image-656951-20170627_095013.w640.jpg
20 Gauge Galvanized Sure Clamp Elbows and Bull Head Tees with Couplers.

image-656952-20170627_095217.w640.jpg
20 Gauge Galvanized Sure Clamp Spiral with Full Cutt-offs.

Clamping Ductwork
clamp together ductwork