Boost 32k Sim Part: Boost 32k Sim Card?

Boost 32k sim card? - boost 32k sim part:

Can someone tell me how to say, between 32K and 64K increase card. Once again I have a lot of them OT on eBay and the seller said it was 32k drive, and not say weather is 32 or 64 of each SIM So I called to stand and I could not tell, too, I just said no way by telephone at the 2 phones have been in double digits. I need a 32k for some older models of Nextel phones.I hope someone knows the answer. Thanks