These needles are the proper length, and will not puncture the liners if correctly utilised WARNING: Item can't be returned or exchanged if liner is weakened or punctured as a result of inappropriate inflation or needle use A versatile liner designed for different head designs presents comfort and ease and https://speedflexadultlarge77456.full-design.com/how-adult-medium-speedflex-can-save-you-time-stress-and-money-73402551