1. High quality and resilience. Minimum shatter-resistant time: 10,000. 2. Very competitive price. 3. Can do logo emboss on 1. High quality and resilience. Minimum shatter-resistant time: 10,000.2. Very competitive price.3. Can do logo emboss on. Rubber barbells/dumbbellsBarbells from1.25kg-25kg 25KG,20KG,15KG,10KG,5KG,2.5KG,1.25KG,diameter of hole can been made 51.5MM,28MM,26.5MM