Hoffman PCM2 Chimney Tall Blk, 30.00x21.01x16.69in, Steel/BlackFeatures:Made of 18 gauge steelTwo sizes to fit various ceiling heightsInfinite adjustment between minimum and maximum extensionBulb gasket seals against flat surfaces and ceilingsS-connectors provided for duct work connectionPurchase Chimney Ceiling Panel separately Product Specifications BRANDHoffman® MANUFACTURERS PART NUMBERPCM2 CONSTRUCTIONSteel DESCRIPTIONContainment System Chimney COLORBlack USE WITH CABINET WIDTH-- A X B X C MM762 x 534 x 424 A X B X C INCHES30.00 x 21.01 x 16.69 AISLE WIDTH INCHES-- AISLE WIDTH MM--