These needles are the right duration, and may not puncture the liners if appropriately utilised WARNING: Merchandise can't be returned or exchanged if liner is damaged or punctured because of inappropriate inflation or needle use A flexible liner designed for numerous head styles provides convenience and steadiness Removable humidity-resistant liner https://reidhkunu.liberty-blog.com/30862063/not-known-factual-statements-about-adult-medium-speedflex