Model 620-AL Smooth Rod Aluminum Barrel Sausage/Bulk/Cartridge Caulk Gun comes with below features:

• 18:1 Thrust Ratio
• Lightweight/Quick Change Aluminum Barrel
• Revolving Barrel
• Zinc Alloy Handle with "ETG"
• Heat Treated Rod Lasts Longer
• Precision Sintered Friction Plate
• Easy Release Star-Burst Reverse Gripping Plate
• Bulk/Sausage Pack Conical Ejector- Less waste
• One Piece Molded Multi-Chemical Resistant Twin Hytrel Cap
• Includes 3 PC-620 Nozzles