Comparison : Item # QD-39-1, QD-39 Distillation Receiver, Dean-Stark
Item # QD-39-2, QD-39 Distillation Receiver, Dean-Stark
Item # QD-39-3, QD-39 Distillation Receiver, Dean-Stark
Item # QD-39-4, QD-39 Distillation Receiver, Dean-Stark