These 6-inch arms are cut from the most dense grade of Toray T-700 carbon fiber available. The arm length and geometry is designed to either swing 6-inch props or >5-inch props and get the cleanest air possible which translates to less prop wash and cleaner lines. The 2020 MultiGP Championship was won with 5.1-inch props on 6-inch arms so the added weight in this aspect, can be beneficial.