Leica GDF302 Tribrach with optical plummet $360 Product Highlights A cost effective tribrach with optical plummet for use in normal environments. GDF302 Tribrach from Leica Geosystems has quality torque resistance, a light weight design and is suitable for GNSS antennas. Torsional stiffness < 5" Weight 885 grams (1.95 lb) 1 / 1 Details Article number: 842064