These needles are the proper duration, and will not puncture the liners if adequately used WARNING: Product can't be returned or exchanged if liner is harmed or punctured on account of poor inflation or needle use A flexible liner suitable for many head styles supplies consolation and balance Detachable humidity-resistant https://speedflex-adult-large96604.glifeblog.com/30017957/the-smart-trick-of-riddell-speedflex-adult-large-that-nobody-is-discussing