SIRUI SL-100 Carbon telescopic center column 19-31 cm more heightThe SL-100 is the center column for most SIRUI tripods. Up to 31 cm more height can be achieved by using the telescopic extension. The reversible tripod screw in the mounting plate can accept tripod heads or other equipment with a 1/4" or 3/8" thread. Especially suitable for the tripods of the SIRUI AM series.