I purchased these flexi rods at my local Sally's Beauty Supply and there was about 10 in the pack for like 9.00
When you wrap your hair around it it looks like the picture above to the right.
As you can see my curls are gorgeous. I don't use any products I just roll my extensions dry overnight and I wake up looking FABULOUS. I follow this routine every night using about 5 or 6 flexi-rods in big chunks.