They fit me perfectly. The top has an HNBR gasket to withstand the heat of the supercharger (I think that killed my last kit) as well as six locking balls. The bottom has five mounting balls, which is an improvement over my last set of four. I had no experience with these top grip manual clutches so I didn't know what to expect. For those who haven't seen it, the handle isn't a valve. He controls the pin that pushes Schröder's pin. You twist the handle counter-clockwise to retract the pin, then attach it to the fitting. Only then turn the knob clockwise to press the shredder. Removal is in reverse order. The quick disconnect still has its own automatic release mechanism to hold pressure in the hose when you remove it. This system does not release gas from your vehicle when you connect and disconnect hoses. i really like it
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