This is a genuine manufacturer-sourced component which is specially designed for use with Walbro carburetors commonly installed on lawn and garden equipment. It is an identical replacement for a missing or a faulty diaphragm that was installed on a new unit. The part helps to provide a tight seal for the pump. Keep in mind this high-quali...Read morety item is made of durable composite material and is sold individually. Please make sure to check the appropriate diagrams of your model for the correct location and application of this components.