McDaniel Metals 21X19.3X36 Insulated Galvanized Sheet Metal Plenum 21 in. W x 19 1/4 in. D x 36 in. L Amazon Dey It has a replaceable core H15FA-1C voomi_id_84230 Compatible with multiple fastening

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★★★★★ 4.2 (28 reviews)

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US$ 42.95

★★★★★ 5.0 (15 reviews)

US$ 72.00

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★★★★★ 4.3 (18 reviews)