Hi Ruth,
The Innokin iClear 16 Dual Coil Replacement Coil Head is not compatible with the 3.5ml Vision Vivi Nova. I'm posting the link for the Innokin iClear 16 below. The replacement coil head is designed for this clearomizer.
http://www.smoktek.com/Innokin-iClear-16-Dual-Coil-Clearomizer-round-tip-15-ohm_p_961.html
Best regards,
Brad