The TRX-18 is a Tripod Extender. The TRX-18 is manufactured from non-conductive material to minimise RF influence.

A half-length version of the TRX-36 above, this extender is 46cm long (18”) and 7.6cm dia (3”). It has a ⅝ Inch UNC male plug at one end and a ⅝ Inch UNC receptor at the other end. This device can be combined with the TRI-77P Medium Duty Plastic Tripod.