(2) Gently scrape open the surface with a small knife. If the color inside turns yellow or red, it is made of copper material; If it turns white or black inside, it is iron or other inferior materials, and it is a fake.
KHEbikes KHE BMX Bottom Bracket Bottom Bracket US BB for 19 mm Axles Industrial Bearing with Adapter
KHEbikes KHE MVP BMX Bottom Bracket Bottom Bracket MID BB Industrial Bearing S/B Sealed Only 154g
KHE BMX Wheelset 20 Inch - Includes MAC3 Tyres - 14mm & 10mm Axles - 9T RHD - Double Chamber Rim - Industrial Bearing - Pre-Assembled - Street & Park - 2.40" - Black
KHE Fixie Rear Wheel 700c 28 Inch Industrial Bearing 32 Hole Black Double Chamber Rim Flip Flop Rigid + Freewheel
KHE Fixie Front Wheel 700c 28 Inch Industrial Bearing 32 Hole Black Double Chamber Rim
KHE MVP Oil Slick BMX Bottom Bracket Bottom Bracket MID BB Industrial Bearing S/B Sealed Only 154 g
