The Graco GH25 Spray Rig is an insulated gooseneck trailer system, designed for professional spray foam applications, offering power, efficiency, and reliability. The Spray Foam Equipment Trailer With Gusmer GH-2 hydraulic system. The Gusmer H-20/35 GH-2 hydraulic proportioner is Graco’s simple, durable machine with impressive performance at an attractive price. FINANCING AVAILABLE