With these spare parts for your Nibo or Gray hatch, you can replace worn or damaged parts for a fraction of the cost of replacing the hatch. Low-Profile Gasket in a 9' length 9/16" Gasket in a 10' length Available for the 100 series: Riser Arm Male Hatch Knob Female Hatch Knob Hatch Tiedown Dog Left-Locking Quick Dog Right-Locking Quick Dog