You should probably contact the source you got them from, with the batch number and exp date.. they should be able to tell you. T3 isn't something to just 'mess around' with... If they are 50mcg and you are taking them thinking they are 25mcg(and taking 2-3 of them), you can REALLY screw yourself up!!!!
That's about the best advice someone can give you.... T3 is made is a few different strengths(several when you include RC sites...), so the only way you will know for sure is to look it up(or contact the sponsor), using the exp date and batch number.... Most good sponsors would be able to tell you with that info, what strength they are...
YOU CAN'T SPELL STRENGTH WITHOUT TREN!!
EVERYTHING SAID, OR IMPLIED BY OVERBURDENED IS TO BE USED FOR ENTERTAINMENT PURPOSES ONLY! I DO NOT CONDONE THE ILLEGAL USE OF ANABOLIC STEROIDS, NOR ANY ILLEGAL ACTIVITY!