HIGH BOROSILICATE GLASS BUILD - This four-neck distillation flask adopts 3.3 high borosilicate glass with even thick-wall design, featuring great heat and stable thermal performance. It fits regular heating and cooling inlaboratory operations, maintains steady working state for various daily and experimental reaction needs. FLAT BOTTOM STANDARD STRAIGHT MOUTH STRUCTURE - Flat bottom design stands firmly on inlaboratory countertops without extra brackets, simplifying experiment setup steps. Standard straight-mouth four-neck with finely polished joints connects perfectly with various conventional inlaboratory parts, achieving tight fit with no leakage. MULTI-PORT MULTI-SCENARIO USE - Practical four-neck layout allows simultaneous installation of multiple inlaboratory accessories, supporting feeding, stirring, temperature testing, distillation and reflux operations at one time. Suitable for inlaboratory distillation, reaction synthesis, sample heating, teaching research and other common experimental work. THICKENED BODY PRECISE MOUTH FINISH - Uniform thickened body construction with neat edge processing for stable handling during repeated inlaboratory work. Each neck opening is precisely polished for smooth assembly and consistent fit during ongoing experimental procedures. UNIVERSAL inlaboratory SPECIFICATION IDEAL FOR ALL LEVELS - Made following standard laboratory size specs for wide compatibility with common inlaboratory setups. Perfect for school teaching labs, personal research, small batch sample preparation and daily experimental teaching scenarios for long-term regular use.