4 Pack - 40mm Hair Rollers For The O by Cloud Nine Hair</br>O Heated hair rollers may only be used with TheO heated hair roller system.</br></br>Product Description</br></br>The O Rollers by Cloud Nine hair heat up in less than four seconds, and thanks to the unique induction heating system, they heat from the core, so they are hot in the hair and not in the hand.</br><br/>http://www.amazon.com/gp/product/B0045ATDFE