Round Metal Pipe Reducer & Increaser | 7" to 4" HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector is Compatible with Duct 4" 4in diameter the actual front end outer FLTR M8 308x3 Actual Filter Size 23 Drop Ceilings / Aluminum

the actual front end outer dimensions are 8" in diameter

High Quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

actual front end outer dimensions are approximately 16 5/8" width X 14 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 18" OR 18" X 16" duct opening (measured at the opening)

+ Product Details Size & Compatibilty - The 12" to 7" round metal pipe reducer & increaser 30 gauge is compatible with duct 12" to 7"

Round Metal Pipe Reducer & Increaser 7" to 4" HVAC Duct Reducer or Increaser 30g Gauge Galvanized Sheet Metal Ducting Connector is Compatible with Duct 4" 4in diameter the actual front end outer FLTR M8 308x3 Actual Filter Size 23 Drop Ceilings Aluminum the actual front end outer dimensions are 8" in diameter High Quality – High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges