The Interdynamics Professional Air Conditioning Manifold Gauge Set is a high-quality tool designed for charging purposes in HVAC and refrigeration systems. This set includes a manifold, gauge, and three hoses (blue low side, red high side, and yellow service hose) in a multicolor design. The gauge is filled with dry air and measures vacuum units in PSI. With a compact design and a length of 12 inches, this set is a reliable choice for professionals in the HVAC industry.