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 allows 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.
This product can expose you to chemicals including lead, which is known to the state of California to cause cancer and birth defects or other reproductive harm.