Our linkage kit comes with 2 German made Minibals, (2) 2mm x .4mm SS standard screws, and your choice of  linkage rods: 1.5", .5", or .375" (the thread on the linkage rods is 3 x .5mm).  This kit will fit Instrument Innovations rotor and axial flow valves and many other makes, including stock Edwards trombones.  These screws are not the Edwards proprietary screws, but the kit will work with the horns.

These do not fit stock Bach valves including the Infinity axial valve.

Please state in the note section of your order the size linkage rod you are looking for or email me at: instrumentinnovations@gmail.com with your comment.