Exhaust Port Cover, Adjustable Width Type Part Number: KHC-HBK Compatible Sizes: ・Width: Built-in gas stoves and IH cooking heaters with a width of 78cm or less ・Height: Exhaust ports with a height of approximately 1.8cm or less Weight Capacity: 3kg Can be disassembled and washed Compatible with IH cooktops Product Size (mm) (Approx.) Width 450~800 x Depth 100 x Height 28 I am selling this because I realized it didn't fit after opening and installing it. No instruction manual