There are 20 chips in total.
These are from a sample batch order, which claims 1 or two broken chips may be included.
their website for tech specs
http://ehash.com/shop/Rules:
Bid starts at 0.05 btc (all 20)
Auction ends: Tuesday night 5/5 at 7 pm est
Free shipping (something cheap, so don't expect next day unless you want to pay)
Us only (unless you want to pay)
escrow if you want to pay fees