BUCCI GOLF SIMULATOR TEES have been designed speciically for use on modern simulators. They have been tested and approved to work on TRACKMAN 4, TRACKMAN i/O, FORESIGHT GCHAWK, FLIGHTSCOPE MEVO PLUS, UNEEKOR QED. They "squish" at impact allowing camera systems to read the ball (not the tee) for accurate reads. They are also more durable than the competition. When you try these tees, you will understand why we brought them to market! This is the new 32 Piece Set. Comes with 4#0-24mm, 4#1-29mm, 4#2-34mm, 4#3-39mm, 4#4-44mm, 4#5-49mm, 4W1-6mm, 4w2-9mm.