Engineered for elite research facilities, our Pear-Shaped Separating Funnels feature the specialized Rotaflow needle valve for unrivaled control during phase separation. Unlike traditional plug-style stopcocks, the Rotaflow system utilizes a precision-threaded synthetic needle to deliver micro-drop sensitivity. Crafted from high-expansion 3.3 Borosilicate Glass, this funnel ensures the chemical durability and thermal resistance required for the most rigorous international laboratory protocols.