What's the highest number of items from a spin?

48, I haven't done it, though, a perfect luck is required.

i saw few times ppl geting 140 or so. 7th day is nultiplying your iteams so spinning at gold gym is giving as you said but if youwill spin 9 pokestops before midnight and then soo after midnight spin 10 gold gym it will be 140 or so