These needles are the correct size, and should not puncture the liners if adequately used WARNING: Merchandise cannot be returned or exchanged if liner is weakened or punctured as a consequence of improper inflation or needle use A flexible liner made for different head shapes offers comfort and steadiness Detachable https://emilioflqkn.sharebyblog.com/30652689/top-latest-five-adult-medium-speedflex-urban-news