This Manfrotto 5/8" adapter converts a 5/8" light stand tip to 5/8"F socket. Both sides have a 16 mm attachment. Used to connect two units with 16 mm spigot, or to obtain a 16 mm female attachment from 16 mm spigot. This replaces the Manfrotto 3101. Attachment: 5/8" female; attachment 2: 5/8" female; color: black; length: 2.56 in.; material: aluminum; weight: 0.18 lbs.