Qualkem Box of 4 x 5 Litre Wet Heating Antifreeze. for all wet heating systems in Motorhomes, Caravans & Boats. 5 Year Corrosion protection. G13 specification, exceeds BS6580:2010 Conforms with leading manufacturers specifications. Frost protection to -27 degrees centigrade.*ALL FLUIDS ARE MINIMUM ORDER 3 BOXES (MIXED). DISPATCHED DIRECT FROM MANUFACTURER. DOES NOT CONTRIBUTE TOWARDS YOURPLS CARRIAGE PAID ORDERS. PLS PLACES ORDERS ON WEDNESDAYS FOR DELIVERY THURSDAY/FRIDAY DIRECT FROM MANUFACTURER.*