These units were purchased from an inventory surplus sale. We do not know the history of them. They are in good cosmetic condition. One of them has a slight bend on the threaded portion, (see pictures) but it looks to be sound. They are about 7" long overall and the threads are 5/8" -13. We are not able to test them. It only comes with what is shown in the pictures.

S301-40 d

8323188