This listing is for a Qty of 48 round stud support plates or backers for 7mm studs. These are 1.125" or 1 1/8" diameter backers, approximately .167" tall. 

These were purchased in bulk and just in a cardboard box or then a "D4". I'm not sure of the brand or the part number. There's nothing stamped on the backer itself either. Because there were purchased in bulk, these will packaged in zip lock bags.

Any other questions about these, feel free to send me a message.