The PLS FS is a metal floor stand for the PLS 3, 5 and 6, with a 1/4-20" threaded mounting screw.
This item is included with the set and system configurations PLS 3R, PLS 3G, PLS 5R, PLS 5G, PLS 6R, PLS 6G and is suitable for the older products PLS 3, 4 and 5.