Graco 13:1 Ratio Internal Mix Gel System with 50 ft (15.2 m) Hose and CartTo keep material costs low, the system has been designed so that it doesnt need a surge bottle and a low amount of solvent and resin is needed to prime the pump. It also features a dual trigger function, allowing operators to change from wet out to chop without removing the chopper. By purely using Graco components, that are proven in multiple industries, you will have a solution that is technologically advanced, durable and long lasting.