Robinair's No. 18180 replacement 'Quick Seal' O-Rings are perfectly sized for 1/4 inch Robinair 'Quick Seal' hoses and adapters. These o-rings quickly restore positive sealing functionality to components and are a cost effective alternative to replacing the whole hose or adapter. Set of 6. 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.