Manfrotto 118 Male Spigot for 2905 1/4-20-Inch Male and 3/8-Inch Male 26mm Long Adapter - Replaces 3107
Universal short 16 mm spigot with double male thread 1/4” and 3/8”. This replaces the Manfrotto 3107.  Attachment: 16mm; attachment 2: 1/4" and 3/8" screws; material: brass; weight: 0.09 lbs.