The AT-300 Adhesive dispensing gun has a 1:1 plunger for use with AT-2010 and AT-4020 50ml cartridges (sold separately) When using AT-6030 adhesive it requires AT-12 (10 to 1 plunger). Replacement plungers are also available.
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![Weld Mount AT-300 Adhesive Dispensing Gun f/AT-2010 & AT-4020 [80300]](http://www.essentialmarineservices.com/cdn/shop/files/48779XL.jpg?v=1702362574&width=1445)