Birchmeier Specialty Lubricant (Birchmeier Grease) is designed to help maintain Birchmeier backpack sprayers. Properly lubricating your sprayer is one surefire way to extending its life so it can provide years of service. Forced pumping of sprayers without grease is a common mistake which can damage sprayers so it is advisable to grease your sprayer regularly. Available in a 1 oz. jar.