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Caulking Gun 3:1 RatioThis caulking gun will mostly work for 2 tubes type of epoxy injection.3:1 Mix Ratio3 = epoxy resin / Tube A1 = hardener / Tube Bfor more information:ContactGlobe (0966)-200-2764 / (0915)-922-7349Smart (0961)-109-0381 / (0939)-100-9645Landline: (02) 8775-3951