These needles are the right size, and should not puncture the liners if properly employed WARNING: Item cannot be returned or exchanged if liner is weakened or punctured because of inappropriate inflation or needle use A versatile liner created for various head styles offers comfort and ease and balance Removable https://adultmediumspeedflex06036.targetblogs.com/31457948/5-easy-facts-about-adult-medium-speedflex-described