These needles are the correct duration, and may not puncture the liners if adequately applied WARNING: Solution cannot be returned or exchanged if liner is ruined or punctured due to poor inflation or needle use A versatile liner made for numerous head designs offers comfort and stability Removable humidity-resistant liner https://riddell-speedflex-adult-l56058.buyoutblog.com/31037395/rumored-buzz-on-adult-medium-speedflex