I put Hall'S Clutch Master cyl. and their're Slave cyln. IN. (I don't know if it is the "Long Trow" or not). It has a blue anodized aluminum housing that fits very LOOSELY! Comes with all the pivot hardware. I had to put the cyl. in my lathe and turn three bands of KNURLING to get it to fit tighter. I also painted it up with PERMATEX so that it would never "Hammer" Loose. I bled it at the slave, using a helper (son) at the pedal and using THE Pump it up, hold it down, open/close, pump it up, hold it down, open/close; method. The two cylinders work perfect together and are now ROCK SOLID! Have fun with it! Marlin.