Magma Padded Grill & Accessory Carrying/Storage Case for 12 x 18 Rectangular Grills - A10-1292. A10-1292. Grill & Smoker Covers. Store your rectangular Magma grill with 12 x 18 inch grill grates and take it on the go with this padded grill & accessory carrying/storage case. Equipped with a large main storage compartment, a removable internal section perfect for carrying two 1 lb propane canisters, a mesh pocket for up to 2 control valves/regulators, and separate side pocket for accessories, this storage case can handle whatever you need to carry while out exploring the seas. Designed with convenience and quality in mind, this storage case is ideal for the grill master on the go.