2-Pack Oxy-Spa Non-chlorine Hot Tub & Pool MPS Oxidizing Shock 2 x 1.5 lb (3 Lbs. Total) (2) 1-1/2 lb. Bottles (3 lbs. total) Granular Monopersulfate Oxidizing Shock - Highest Active Oxygen Unsurpassed quality - Equals or outperforms all other brands Maximum effectiveness in pools and hot tubs Great Buy - STOCK UP & SAVE!!