Capacity: 20 oz.Thrust Ratio: 12:1Barrel Diameter: 2"Barrel Material: AluminumFeatures Double-Gripping Plate Technology For Longer Tool Life And Smoother ApplicationAdjustable Wear Compensation Device For No-Loss Trigger MotionDesigned For Standard Viscosity MaterialsConvenient Rotating Swivel BarrelDurable Sausage Pistons Prevent Bag-WrapIncludes: Caulk Gun Assembly, (3) Narrow Plastic Nozzles, (3) Wide Plastic Cone Nozzles, (2) Polyplastic Sausage Pistons, (1) Hytrel Bulk Piston And Steel Ladder Hook Pull Attachment