These needles are the correct length, and will not puncture the liners if thoroughly used WARNING: Solution can't be returned or exchanged if liner is harmed or punctured as a consequence of poor inflation or needle use A flexible liner designed for different head styles offers comfort and ease and https://tysoniejlo.onesmablog.com/the-single-best-strategy-to-use-for-riddell-speedflex-adult-large-71170702