Round head dumbbell series: specifications from 1-70kg and 2-150lb full series, rubber materials can be selected PVC, TPE, TPE, TPU and other black and color, can be odorless environmental protection materials, can be done pvc leather label, aluminum label and pu crosswording, material certification includes SGS, RoHS, etc., the inside of the handle can be added electroplating decorative ring, surface treatment has electroplating decorative chrome and hard chrome, can also do PVD treatment.