... Caulking Gun, Air Caulking Applicator for high-viscosity Coatings and Polyurease Description:Item no.: CGA600-1-1 two ... pieceFeature:In-line double push rods, prevent cartridge tilt and twist (F1)Instant Dump Valve (F2)True Adjustable ... , 750ml*75ml, 600ml*300ml, 600ml*600ml,750ml*750ml and so on. )Warranty time: Six months, from the ... Caulking Gun, Air Caulking Applicator for Coatings and Polyurease