TRIPODS Center Columens Benro AC1 Center Column - Aluminum Benro AC1 Center Column - Aluminum 5 years warranty Availability Product is no longer available Manufacturer Benro Product code 784925 Description AC1 Aluminum Center Column is the main center column for our tripods in the Aluminum 1 series. Sold to your current Benro as replacement or spare component. The column features a 3/8"-16 regular thread for mounting most heads of the tripods.