These needles are the proper size, and will not puncture the liners if properly utilized WARNING: Item cannot be returned or exchanged if liner is ruined or punctured resulting from inappropriate inflation or needle use A flexible liner made for many head styles presents comfort and ease and security Removable https://adult-medium-speedflex62722.kylieblog.com/31264038/how-adult-medium-speedflex-can-save-you-time-stress-and-money