Livepro’s polyurethane two-colors sport barbell is composed of an alloy steel core embryo with a diameter of 13cm and a thickness of 7mm. This diameter and thickness ensures the hardness and stability of the barbell. Its exterior is wrapped with a high quality polyurethane material with a thickness of 21.5-54.3mm. When dropped, the barbell is silent and will not cause damage to the floor. This barbell is waterproof and wear resistant for long term use. It has a unique design, exquisite color matching, and conforms to the IWF standard. A strict drop test was performed where the barbell was dropped from a standard height of 30,000 times (except for 5kg). Results show that this barbell does not get deformed or damaged from excessive dropping. A variety of colors are provided, each color represents a different weight causing the barbell to be easily distinguished.