Youth over 12 and adults share this reflex trainer through four locking heights of 54.5 in, 57 in, 59.5 in and 62 in. A protective foam pad sits beneath the solid PU ball to catch misaligned hits, which is the difference between a bruised hand and a clean session. The high-tension metal spring returns the ball instantly, so reaction drills keep their rhythm. Ballast comes from 66 lbs of water or 100 lbs of sand poured into the 9.5 in high base, backed by six suction cups that hold the unit on tile or a wooden floor. Footprint is 19 in square and empty weight is 10.5 lbs. PU leather gloves with shock-absorbing foam are included, and assembly is straightforward.