pick some some slin needles, you can buy them over the counter at most pharmacies. their 28-29g, real small 1/2 inch, you dont feel a thing, you can use your hcg in them with no problems/clogs, and its measued in IU's, just what you need. good luck, also i believe 2000-5000 IUs every 5th day is fine, but if you want more frequent injections i can see the point of it. also hcg is known to cause dramatic increases in test so have some anti e's around. also i think you probably know but its worth mentioning hcg doesn't help recover the hpta whatsoever, it actually delays it and its practically useless...