MALE / FEMALE BUSHES Material: Used as a conduit pipe fittings Application: Used as a conduit pipe fittings Size Metric: 2Omm to 50 mmImperial : 3/4" to 2" (Short and long patterns) ADAPTORS Material: High grade brass Application: Used as a means of providing attachment for flexible tubes. Size Metric: 12mm to 50 mm (Standard combinations) Imperial : 1/2" to 2" (Standard combinations)