Maintains vent setting when grill is opened and closed. Cook in Rain or Snow, all weather Cap. Will not rust, fall off or break. Vent design allows for precise low temperature control. DOES NOT FIT KAMADO JOE JR The SMOKEWARE Chimney Cap is so versatile it replaces the daisy wheel & porcelain cap. And there is no need for any extra rain attachment or the rEggulator with our Cap. Made of 304 Grade Stainless Steel, it includes a New Tapered vent design for better low temperature control. Leave the vent open when not in use to leave your grill dry and ready to use for the next cook.