Hulk Rubber Olympic Fractional Weight Plates – Micro Weight Plates – 4lb set of Rubber Plates for Olympic Barbell or… $28.50 – $44.47 Make sure this fits by entering your model number. New discreet design. Fractional plates that blend in with standard barbell plates so you don’t attract unwanted eyes. Microplates for serious weightlifters. Add 1 lb. to your Olympic barbell & dumbbell. Progressively overloading your muscles for maximum gains.