Qualkem Box of 10 x 1 Litre 40 Shot BLUE Cassette Toilet Fluid. A high quality Formaldehyde free Cassette Toilet Fluid which is both flush and waste fluid in one, with a long-lasting cherry fragrance and easy wipe dye, formulated to use 20ml in the waste and 5ml in the flush. Please Note: CHEMICALS ARE DISPATCHED DIRECT FROM MANUFACTURER AND INVOICED SEPERATELY BY PLS. ORDERS ARE PLACED BY PLS ON TUESDAYS AND THURSDAYS EACH WEEK FOR DELIVERY WEDNESDAY AND FRIDAY DIRECT FROM MANUFACTURER.