Model BQL-818 BQL- 825B BQL- 830C Capacity 18L/h 25L/h 30L/h Power 1800w 2000w 2650w Hopper 2*5.5L 2*5.5L 2*10L Freezing tank 2*1.7L 2*1.7L 2*1.8L  Dimension 540*575*1370mm 540*615*1410mm 565*640*1470mm Pre-cooling : 1. To keep the hopper fresh and prevent deterioration especially in hot weather 2. It takes less time to make ice cream because the ice cream mixture is already cool when it comes into the freezing tank, then it takes less time to freeze and become ice cream