PF - laboratory-flange triple clamp, 18/10 stainless steel Holder for all PF- laboratory flasks for the alternating removal of vessel and lid. This special quick-release fastener ensures that the two laboratory flat flanges of reaction tube and flat flange lid are connected and, in addition, that the reaction tube and/or flat flange lid are held individually.(optimal flange angle 45°). Without accessories. Rod 15/26.9mm diameter.