Optimus Windshield. It saves you fuel by reducing boil times in windy conditions and is flexible enough that should fit gas canister and pots with a max diameter of 5 in. Specifications for Optimus Clip-On Canister Stove Windshield: Manufacturer: Optimus Weight: 3 oz Application: Cooking Fabric/Material: Hard Anodized Aluminum Stove Accessory: Wind Screen Features of Optimus Clip-On Canister Stove Windshield: Leightweight clip-on windshield Increases stove efficiency and substantially reduces gas consumption Fits every gas canister according to EN417 Compatible with standard pots and high profile heat exchange pots with a max. diameter of 13 cm Easy packability (fits around the Optimus Terra Weekend HE pot) Package Contents: Optimus Clip-On Canister Stove Windshield Optimus Windshield