{"product_id":"brass-round-grates-vent-register-with-damper-9-boot-10-outside","title":"Brass Round Grates Vent Register With Damper, 9\" Boot, 10\" Outside (ZM-901)","description":"\u003cp\u003e\r\n\t\u003cb\u003e\u003cfont size=\"2\"\u003eZM-901\u003c\/font\u003e  Round 9\" Hole Size Brass Grille With Damper; 10\" Exterior Diameter\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003e\r\n\tMade to fit into a 9\" round hole or duct, these grates have an exterior diameter of approximately 1\" greater than their boot size.  The damper is made from finely cast iron, with a Lost Wax Cast brass operator.  None better anywhere, at any price.\u003c\/p\u003e\r\n\u003cp\u003e\r\n\tThis 9\" grate is available in either brass or iron ( painted black \u003ca href=\"\/products\/cast-iron-round-floor-ceiling-or-wall-grates-for-air-or-heat-vent-register-cover-with-damper-9-hole\"\u003eZM-IR-901\u003c\/a\u003e).\u003c\/p\u003e\r\n\u003cp\u003e\r\n\tYou may feel some resistance when opening and closing the cast iron louvers for the damper.  The friction helps to keep the louvers in a set position to your liking, and withstand normal increases in air pressure caused by higher fan speeds from heating and cooling units.\u003c\/p\u003e","brand":"0","offers":[{"title":"Default Title","offer_id":49995441799405,"sku":"ZM-901","price":590.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0813\/5799\/6269\/files\/ZM-901__a_Brass-Round-Grates-Vent-Register-With-Damper-9-inch-Boot-Size-10-inch-Outside.jpg?v=1779305182","url":"https:\/\/jn2vnf-0i.myshopify.com\/products\/brass-round-grates-vent-register-with-damper-9-boot-10-outside","provider":"Vintage Hardware \u0026 Lighting","version":"1.0","type":"link"}