The Laboratory Glass | Receiving Flask (1,000 ml) – Venting Valve is a 1000 ml borosilicate glass receiving flask for collecting distillate or residue fractions from VTA and UIC wiped-film distillation systems. Manufactured from high-quality borosilicate glass with a ground glass NS29/32 joint, it provides excellent chemical resistance and thermal stability during distillation. Compatible with VTA VKL and VKS series and UIC KDL5 distillation system collection manifolds. Sold individually; inspect regularly for chips or cracks that could compromise vacuum integrity.