Depending on your needs, you can get Adjustable, Sets and Iron. Most Dumbells used today are in Silver, Multicolour and Black. Up to 54% discounts on Dumbells can be found only on iprice. The two best-selling Dumbells currently are the 22kg Cast Iron Dumbbell Set, : KAP0870 10kg Cast Iron Dumbbell Set and Weight Adjustable Dumbbell Slimming Equipment for Aerobics for Arms Body Comprehensive Fitness Exercise Small Dumbbells. The most popular Dumbells are from JIJI, Kettler and SP. Dumbells from these brands usually cost about S$ 3.00 to S$ 247.00.