500ml Separatory Funnel with PTFE Stopcock - Pressure Equalizing Addition Funnel for Chemistry Lab, Essential Oil Extraction & Liquid Separation (Ideal for Organic Chemistry Experiments & Essential Oil Distillation)

1. The 500ml Pressure-equalizing dropping funnels have an additional narrow-bore glass tube from the upper part of the funnel bulb to the ground glass joint around the stem at bottom.2. With standard 24/29 taper glass outer joint at Top and inner joint at bottom, with PTFE stopcock upper on the bottom glass joint.3 It is made of boro glass.