The one I have is from Racers Edge, available direct or through Stormer Hobbies. It works with both standard laydown or standup brush hoods for under $20. The ideal way to use it is first test the brushes so see how they are wearing, then only adjust (twist) the hood that requires alignment. Trinity, Niftech, Parma (PSE) and a few others sell variations but some are more costly or other styles do not allow for individual alignment of each brush hood.