ITEM NAME:Outdoor Burner Valve Flat Cylinder Control Switch Stove Camping Hiking Accessory Product Description Description: Specifications: Unit weight: 34g Size: 52mm Intake inner diameter: 11mm Outlet inner diameter: 8mm Included: 1 x Flat Cylinder Control Switch.If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item. Warranty Service. 12 months Warranty.