These needles are the right duration, and may not puncture the liners if correctly made use of WARNING: Products can not be returned or exchanged if liner is weakened or punctured as a result of improper inflation or needle use A versatile liner created for numerous head designs delivers ease https://riddellspeedflexadultlarg69510.blog-gold.com/38353863/everything-about-riddell-speedflex-adult-large