Resources VeriFlow and Orifice CalculatorUse our custom VeriFlow/Orifice Calculator to find what type of VeriFlow or TeeJet orifice you might need. Valmar Gearbox Chart GeneratorUse to generate a Valmar gearbox chart, unique to your drill. TeeJet Sprayer CalculatorUse TeeJet’s official spray nozzle finder to find what type of TeeJet nozzle you might need.