Leak-tight compatibility across 250 ml, 500 ml, and 1000 ml configurations is ensured by 24/29 joint connections and 14/23/19/24 cooling joints with precision ground conical seals (ratio 1:10), enabling reliable operation in universal lab setups. Laboratory-grade borosilicate glass, made from 3585-compliant borosilicate glass, provides excellent thermal shock resistance from -30 C to 550 C. This combination of joint versatility and high-quality glass supports safe handling, quick configuration changes, and durable performance in demanding lab environments. Use scenarios: - Small-scale distillation or reflux experiments using 250 ml or 500 ml configurations with condensers and receivers connected via the 14/23/19/24 cooling joints. - Flexible mid-scale synthesis on a universal lab bench, easily adapting to different apparatus thanks to multiple joint sizes. - Large-volume or modular setups up to 1000 ml, enabling rapid reconfiguration for diverse experiments while maintaining leak-tight seals.