Class A Borosilicate Glass Volumetric Flask Set, 3-Piece, 50-250mL Glass Funnels_Filter Funnels sized to accept a bell

sized to accept a bell jar for atmospheric-pressure and vacuum demonstrations

the alternate-SKU twin of PHVSSPRING for spring-extension and spring-constant investigations

Medium-speed 85 gsm qualitative filter paper circles with 10-micron pore size measure 21

Concave glass mirror at 75mm diameter and 150mm focal length on a ~3mm-thick blank

Powder-coated cast iron retort base fitted with a threaded support rod

Class A Borosilicate Glass Volumetric Flask Set, 3-Piece, 50-250mL Glass Funnels_Filter Funnels sized to accept a bellCalibrated to ASTM E288 Class A across the three mid range analytical volumes, this borosilicate volumetric flask set ships with glass penny stoppers for precision dilution work.