The Jenny K-Pump compressors are available on 12 electric and four gas-powered Jenny wheeled-portable air compressors, as well as service vehicle and compressor/generator models. Upgrades include new, patented easy-access unloader pins. An oil sight glass allows an operator to check the oil level within seconds. A patent-pending crankcase breather system features a replaceable filter. The cast-iron design enhances durability and resists potential abuse.