Yeah, listen to WarmWaterDiver, this is confusing. Here's the manufacturing time hierarchy, near as I can figure it.
1. DiveRite TransPac (original design)
2. ScubaPro X-Tek (pretty much the same as the TransPac, but cost a LOT more)
3. DiveRite TransPac II (small changes made in response to SB copying original TransPac, which is now unoffically termed the "TransPac I")
4. ScubaPro S-Tek (trifling changes made from X-Tek, mostly for marketing)
5. DiveRite TransPac (slightly modified TransPac II, with more sizing options. Oh and you get some color choices)
So you have "old" TransPac's, "new" TransPac's, and TransPac II's which go in-between, like peanut butter.:06: