ARO Force Piston Pumps 5 Gallon SPX Package - 0.74 GPM to 3.2 GPM (2.8 LPM to 12.3 LPM). Ideal for medium- to heavy-viscosity extrusion, ARO's single post ram with pump, follower plate, and controls allows for easy contianer changeover while providing industry-leading downforce during operation. Integrated wet cup ensures extended pump life. Reliability - Eliminating downtime, the unbalanced air valve ensures stall-free pump operation. Durability - Hard chrome plated plunger improves abrasion resistance. Versatility - Multiple mounting configurations and materials of construction for your specific application needs. Environmentally Sound - Optional muffler ensures pump meets OSHA specifications. Serviceability - Minimal part count combined with tie-rod construction for simple, efficient repairs. Typical Applications - Pumping sealants, adhesives, epoxies, inks, lubricants, urethane, silicone, and caulk. Package Description: 5 Gallon, Single-Post Ram Package, Basic Pump Model: AF0665S11XXXX, AF0646S11XXXX, AF0443X11XXXX, AF0623S11XXXX, AF0430G11XXXX, Single-Post Ram: RM051S-C, Muffler: 67445-1, 67445-2, 5 Gallon Follower Plate