Similar to CG-1261 but with the uptake tube vacuum jacketed to improve distillation performance. The jacket eliminates the possibility of condensation or recrystallization of distillate in the sidearm. The 5ml has subdivisions of 0.20ml; 10ml has subdivisions of 0.1ml; the 20ml has subdivisions of 0.2 from 0 to 3ml and 0.5 from 3 to 20mL. Available with glass or PTFE stopcocks.