Leica GDF301 Tribrach without optical plummet $190 Product Highlights The GDF301 Tribrach without optical plummet is best for use in normal environmental conditions. This cost effective and lightweight tribrach is suitable for all light-weight instruments of low angular accuracy.Torsional stiffness < 5"Weight 800 grams (1.76 lb) 1 / 1 Details Article number: 842063