Our round-bottom flask glassware series is offered in single-neck, two-neck, three-neck, and four-neck configurations, covering capacities from 1 L, 2 L, 3 L, and 5 L up to large-volume 10 L and 20 L formats. Manufactured from high-purity borosilicate glass with uniform wall thickness, each flask is designed for reliable heating, reflux, distillation, and complex reaction setups. The multi-neck options allow simultaneous use of condensers, addition funnels, probes, and inert gas lines, making the series suitable for academic laboratories, professional research environments, and pilot-scale or industrial R&D applications.