Similar to No. 7759, except with 2mm bore PTFE stopcock on 20 and 80mL sizes, 3mm bore PTFE on 250mL size. In addition to collecting and filtering, this vessel may be used as a crystallizer. With two standard taper 14/20 or 24/25 outer joints and two standard taper 14/35 or 24/40 inner. With fritted disc.