That might be IU's, but I am not sure. HCG can be administered either IM, or subQ. The easiest way to use it IMO is subq. I have posted many times on HCG, and the proper administration. There are two schools of thought when it comes to HCG. There is a sticky above for the use of HCG in PCT, or you can use it throughout your cycle. If your young, care about your balls, and you want to have the best possible chance of protecting them, I would use HCG during your cycle. HCG during the cycle will protect the leydig cells, keeping your balls full and functioning. Which in turn will make recovery much easier. The way I personally use HCG is either 500iu 2xew, or 500iu e3d (72 hours). HCG should be started at the very start of your cycle, as shut down begins immediately. I have posted in detail about the use of HCG many times, if you cant find it in the search PM me and I will post it again.