Manfrotto 131DDB Tripod Accessory Arm for Four Heads (Black) TetherBLOCK TB-MC-005 In the latest revision the

In the latest revision the diode level shifter is replaced with a more robust MOSFET level shifter

PoE support

Additional slot can fit a second GoPro camera and housing or accessories

Removable Cable The included removable

Manfrotto 131DDB Tripod Accessory Arm for Four Heads (Black) TetherBLOCK TB-MC-005 In the latest revision theReplaces #3153B The Manfrotto 131DDB Tripod Accessory Arm for Four Heads mounts onto the center column of tripods with 3 8" threads. The platforms feature 3 8" screws, which allow a standard tripod head to be mounted on either or both sides. In addition, the horizontal bar features 3 8" screws on both ends, allowing mounting of tripod heads from the sides. Replaces part number 3153B. UPC: 719821287858 Horizontal Arm Travel 12" ( 30. 7cm ) Length 23.