Từ khóa: hut am

Manufactured thick, robust and heat resistant borosilicate 3.3 glass without a vacuum stopcock. Featured with a 2-way high vacuum stopcock enabling consistent and uniform vacuum draw and release. Vacuum stopcock can hold maximum vacuum of 1 Torr more than 24 hours. Excellent smooth grinded body and lid flanges guarantees airtight closure. Supplied with a porcellain perforated desiccator plate.