The system is comprised of ten complete borosilicate glass units and a 10 position aluminum heat block and apparatus holder, coated with PTFE for corrosion resistance. Glassware, heater, water and vacuum manifolds, controls, and connections are integrated into a single, compact system.Andrews Glass Company has packaged a 10 station midi-distillation system complete with all components and several key accessories into a "Super Value System". In addition to the base equipment, the Super Value System includes two extra sets of glassware, a compact (6.5 lb.) vacuum/pressure pump, an excess gas trap, and a 40-hole stainless steel flask rack. The Super Value System saves you 30% on these frequently-used "extras".