{"product_id":"backdraft-vertical-mount-3550-66x14","title":"Backdraft Vertical Mount 3550-66X14","description":"h3.Standard Features * 3550 - Vertical mount * 3560 - Horizontal mount air up * 3570 - Horizontal mount air down * 3580 - Round sizes available 5\" to 24\" * All non-motorized backdraft dampers * Dampers are opened by air pressure differential and closed by gravity * 16 gauge channel frame with 26 gauge galvanized blades * Out-of-airstream linkage * Blades are vee stiffened 26 gauge for strength and stability * Square steel pivot pins * Nylon bushings * Single blades on 10\" width or less * Adjustable counter balance to adjust various opening pressures * Galvanized finish h3.Options * Sleeve variations * Bronze bearings * Mounting flange","brand":"vendor-unknown","offers":[{"title":"Default Title","offer_id":14459982774341,"sku":"211780","price":1134.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/7509\/7157\/products\/06f4875f507ca0b40227eb4d8cea13ff_6d54e210-1e9c-476c-91fb-7ca14b815402.jpg?v=1537551192","url":"https:\/\/www.registers-direct.com\/products\/backdraft-vertical-mount-3550-66x14","provider":"Registers-Direct","version":"1.0","type":"link"}