Robinair's No. FLCK-1 Filter Conversion Kit includes the necessary components to replace the obsolete No. MF1275 swivel fitting used on earlier Promax A/C Recovery and Recycling units to allow the use of a standard male/male filter. Kit includes 4 inch long hose, male/male inline filter, and adapter. Coupler nuts on hose feature deep knurling for a positive grip that enables quick finger-tightening. Hose ends feature a strong six-sided crimp that provides a secure, reliable connection between the hose and barb - even at maximum pressure. 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 construction.