Quick Answer: The Flasks Flat Bottom, Wide Neck are made of borosilicate glass and have a beaded rim. They are listed in capacities from 50 ml to 2000 ml.
Last updated: October 2026
Key Features
Borosilicate glass
Flat bottom and wide neck
Beaded rim
Neck diameter 34 mm to 76 mm, by size
Capacities from 50 ml to 2000 ml
Technical Specifications
Specification
Value
Material
Borosilicate glass
Rim
Beaded
50 ml
Base dia. 51 mm; neck dia. 34 mm; height 90 mm
100 ml
Base dia. 64 mm; neck dia. 34 mm; height 105 mm
250 ml
Base dia. 85 mm; neck dia. 50 mm; height 138 mm
500 ml
Base dia. 105 mm; neck dia. 50 mm; height 163 mm
1000 ml
Base dia. 131 mm; neck dia. 50 mm; height 190 mm
2000 ml
Base dia. 166 mm; neck dia. 76 mm; height 230 mm
About This Product
Flat-bottom flasks stand on the bench without a support ring and are used to heat, mix and store liquids. The wide neck makes filling and cleaning easier. Conical flasks and distillation flasks are listed in the same range.
Frequently Asked Questions
Q1. What capacities are the Flasks Flat Bottom, Wide Neck listed in? 50, 100, 250, 500, 1000 and 2000 ml.
Q2. What neck diameter does each size have? 34 mm on the 50 ml and 100 ml sizes, 50 mm on the 250 ml to 1000 ml sizes and 76 mm on the 2000 ml size.
Q3. What is the rim like? The flasks have a beaded rim.
