Basically the same as before, an AB series, but this time with an adjustable 'stop' for repeatable fine-line work. Great company to deal with - they sussed out the problem with my 'old' one, and sent me a new fluid nozzle, free of charge, with the new brush! So now I have the new one, plus the old one which has lost a bit of it's fine-line capability due to filing the needle, but still works fine!