Century Hydrocore 120lb heavy bag and 3 round interval timer in MI 1. the Hydrocore XL offers a bigger striking surface. A larger inner water core, and more weight. is an excellent choice for power hitters and anyone else who is interested in a heaver bag with a more realistic and life like feel. Easier on the hands and wrists than traditional heavy bags Four web straps support steel chains 120lbs. When filled 14" diameter x 52" tall --$95 2. Amber sports 2,3 and 4 round interval timer for boxing, MMA etc.. Bell rings at the start of round and rings at the end of round. $65 Shipping is $10.50 for either item.