Product Features: 1. PFA material (translucent) 2. High and low temperature resistance: -200C to 260C 3. Strong acid and alkali resistance, high temperature resistance 4. No dissolution and precipitation, no contamination of samples 5. The principle of sub-boiling distillation and heat radiation. 6. Innovative advantages: Timed and segmented temperature control, annular heating jacket, liquid level gauge, pagoda-shaped condensation chamber Product Specifications: 500ml/1/2/4/5/6L