Product#: TG-3810 Availability: This item normally ships within 1 - 2 business days. Description: Similar to 3800, except one stopcock has been replaced with a Teflon® valve. Also, a Liebig style condenser has been added to the distillate take–off tube. Other stopcocks are either 2mm or 4mm straight bore glass or Teflon®. Please specify.