One weighted boom cymbal arm with the black Ludwig logo wing screw. The part number is P-2824B in the 1980 parts catalog. Used on Hercules and Modular cymbal stands from late 1970's through early 80's. The part works great and was removed from a working stand. Some signs of use and wear, fine rust/pitting specks as shown. Total length is 25" and 1" diameter.  Please ask questions as needed and thanks for buying.