Bob The ones I use are a 1.5 mil sometimes 2.0 mil bag. Depends on size. My 4x14, 6x16 are 1.5 mil, my 8x20 or 10x20 bags are 2.0mil. My really large bags 16x36 are a 2.5 mil. I also use a really nice size bag to ship my apistos in. I get the 5x20 bags through the NAFBG. These are a 2.0 mil bag and 2 bags fit nicely into a 8x20. Enough water and lots of air for shipping or going to auctions with. I really like these bags. Cost me $5 per 100. John ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!