You get one Andis guard also known as an attachment comb. These combs fit any 10, 15, or 30 blade. Do not use with a 40 blade. This is an open box with guards that are new unused. Dede's most used and most favorite are the Blue 2 and Purple 4. The inches stated is the amount of hair left on the dog. Example 1/4" guard leaves 1/4" hair on the dog. All Sales Final. It fits the Andis Ultra Edge and Ceramic Edge Blades. Not sure, ask first, if you have a cheap clipper that came with plastic guards, this will likely not work, but better safe than sorry and call in or email a question before you purchase.