Robinair's No. 18192 Field Service Coupler Set is designed to connect Robinair Enviro-Guard hoses to service ports on automotive R-134a A/C systems. Quick-connect design includes an integral safety sleeve which protects against injury and refrigerant loss if the coupler is disconnected under pressure. The compact design easily fits into tight quarters and the 6-ball coupler design provides a more stable grip on the fitting than lesser 4-ball designs. Set includes 1ea. low-side and high-side manual couplers with rugged chrome plated brass construction that ensures long life and reliable performance. Robinair, a Bosch Automotive Service Solutions brand, is a global leader in service tools and equipment based in Owatonna, Minnesota. Robinair is recognized throughout the world as the quality and performance leader in AC/R evacuation tools and this position has led to its success with the full range of products that serve the heating/ventilating/air conditioning/refrigeration (HVAC-R) and mobile markets. Robinair's R-134a Enviro-Guard hose set for 34788, 34288, 34134Z RRR machines features a pair of 9' long hoses (red/blue). Enviro-Guard hoses incorporate a special barrier material which meets all specifications for low-permeation construction and virtually eliminates any permeation of refrigerant, while remaining flexible for ease of use. Hoses are clearly marked for R-134a use and feature a working pressure of 740 psi and a burst pressure of 3700 psi. Made in the USA. Robinair, a Bosch Automotive Service Solutions brand, is a global leader in service tools and equipment based in Owatonna, Minnesota. Robinair is recognized throughout the world as the quality and performance leader in AC/R evacuation tools and this position has led to its success with the full range of products that serve the heating/ventilating/air conditioning/refrigeration (HVAC-R) and mobile markets, which includes the automotive aftermarket along with other industries such as agriculture and constr