Atlas Sound AD-11ESurface Mount Female Mic Flange 5/8" #27Thread 100 pc Ebony is a 5/8"-27 female flange with 13/4" base diameter; ebony (Net Weight: 1 oz.) It has a heavy duty design for use in Touring P.A. Applications and made with quality to last long and assures compatibility. U. S. Standard 5/8"-27 Termination Accommodates All Types of Microphone Holders