Gas installation kit. All the parts needed to connect a gas water heater. Contains: (1) 18" flexible gas connector, (1) 1/2" pipe nipple, 1 Female nipple connector and 1 Male nipple connector, (2) 1/2" pipe connectors, (2) 3/4" pipe connectors, (2) 3/4" pipe nipples, (2) 3/4" to 1/2" reducer bushings, and (2) 15" flexible water connectors. Contains: Connectors, Bushing & Nipples