 money back guarantee i've never heard of anybody using it and if you order multiple packs you're going to get free shipping and i know you are going to order multiple packs that's zelmans go to zelmans.com z-e-l-m-i-n-s zelmans.com 15 off when you use the code handle h-a-n-d-e-l at checkout and take advantage of the 15 off go to zelmans z-e-l-m-i-n-s zelmans.com