Work on your speed and boxing skills with the Speed-Ball Boxing Trainer Set Just pop the headband on and fit it to your forehead to set up your trainer Great for improving your speed and reaction times  Perfect for boxing training as well as cardio and other fun exercises Comes with an adjustable head strap as well as a choice of balls Balls have different weights for varying bounce-back speeds: Black ball - 23g Red ball - 85g Tennis ball - 60g Please see Full Details for product specifications   Buying Options: 3.99 pounds instead of 19.99 pounds for the Band With Black Ball - save 80% 6.99 pounds instead of 24.99 pounds for the Band With Black and Red Balls - save 72%  9.99 pounds instead of 29.99 pounds for the Band With Black, Red and Tennis Balls - save 67%