These needles are the correct size, and may not puncture the liners if properly applied WARNING: Item can't be returned or exchanged if liner is damaged or punctured because of inappropriate inflation or needle use A versatile liner designed for different head shapes supplies comfort and balance Detachable moisture-resistant liner https://zionjpitj.develop-blog.com/37212626/indicators-on-adult-medium-speedflex-you-should-know