From the manufacturer

Height Adjustment 18-25" 26-43" 20-32" 26-43" 26-43"
One Hand Adjustable ✓ ✓ ✓ ✓ ✓
Hand-Rolled Flextop ✓ ✓ ✓ ✓
Replacement Parts ✓ ✓ ✓ ✓ ✓
Commercial Grade ✓
Weighted Base ✓
Designed for Uneven Surfaces ✓
Total Weight 5.8 lbs 6 lbs 6 lbs 13 lbs 8.2 lbs
Base Description Strong, stable,flexible rubber Lightweight, flat square made of composite material Lightweight, flat square made of composite material Tripod "Claw", metal with rubber overmold Composite home plate style base
Age: Youth /Adult Tee Ball Adult Youth Adult Youth & Adult