These needles are the proper length, and may not puncture the liners if adequately used WARNING: Products can not be returned or exchanged if liner is destroyed or punctured due to improper inflation or needle use A versatile liner designed for several head shapes offers ease and comfort and stability https://adultmediumspeedflex12425.atualblog.com/37100637/5-essential-elements-for-adult-medium-speedflex