Birchmeier Sprayer Lid Gasket (14412901) can be used as a replacement lid gasket for the Birchmeier backpack sprayers. This large O-ring secures the lid and it helps prevent chemicals from leaking. It’s also one of the parts that usually wear out so it’s a good idea to have a one available in case you need to change it. This replacement part guarantees to maintain your backpack sprayer so it can deliver years of service.