1lbs Silver Brazing Rods 6% Silvaloy 28 Sticks Fixed Blades with Damper + Product Details Size – 14" Round Duct Pipe For 10 duct opening FR M 414 White

+ Product Details Size – 18"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 23 3/4" x 1"

Applications – Suitable for cutting (thick & thin) PVC tubing diameter below 45mm - Uses ratcheting design for effortless cutting

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 20" OR 20" x 30" duct opening (measured at the opening)

1lbs Silver Brazing Rods 6% Silvaloy 28 Sticks Fixed Blades with Damper + Product Details Size – 14" Round Duct Pipe For 10 duct opening FR M 414 White + Product Details Size – 18"w X 28"h is the size for the duct opening measurement only Actual Filter Size – 13 3 4"w x 23 3 4" x 1"