3 Neck Heavy Wall Round Bottom Flask USA Made Size:10L Turn on heat and set 5 psi Cooling water Turn on heat and set to 60C Specifications Materials: BUNA N (Nitrile) 316 Stainless Steel Mesh Overmold Conformance FDA Compliant Meets 3A Standards Thermal Properties: Low Temperature Range: 70°F Minimum for Continuous Use(Static): 40°F Brittle Point: 70°F High Temperature Range: +210°F to +250°F Maximum for Continous Use (Static): +250°F Gas Permeability: Excellent Durometer or Hardness Range: 20 95 Shore A Tensile Strength Range: 200 3 Specifications Material Heavy Wall Borosilicate Sizes Available: 10000ml 24 40 Center Joint and 34 45 Side Joints 20000ml 24 40 Center Joint and 45 50 Side Joints MADE in the USA This USA made 3 Heavy Wall Round Bottom Flask is designed specifically for Short Path Distillation units and allows dual distillation heads and cows so there is more vapor flow from the heating mantle