The ENERGETICS AB Roller Pro features foam-covered handles and allows you to perform various ab exercises. with discs of 16.5 cm diameter. Polypropylene (PP) | Nitrile rubber (NBR) | Ethylene Vinyl Acetate (EVA) | Iron It's crafted with high-quality materials for a comfortable workout and a secure grip. Plus, it's strong and durable, so you can use it for years to come.