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A briquette form of chlorine used as a shock treatment for larger volume pools or as a chlorine sanitiser for swimming pools and spas. The product offers an enhanced COSHH rating with 68% available chlorine content in 7g pillow shaped briquettes.  Efficient dosing via a dedicated feeder.   A built-in scale inhibitor reduces maintenance requirements for equipment and feeding systems. Product quantity: 25kg Also available: hth Easiflo Briquettes (Calcium Hypochlorite) 10kg Material Safety Data Sheet (MSDS): MZZZ652.HTH Briquettes (All grades) – SDS Or why not try our own CalHypo Briquettes 10kg / 25kg (bulk purchase discounts available).