The Poncho Safety Shield covers a flask in a Series TM or STM mantle, greatly improving operating safety. Flammable liquids should be processed in Series STM mantles only if a Poncho Safety Shield is used and, in sizes 12-liter and larger, the mantle and Poncho can be purged with an inert gas such as argon. (Nitrogen is not recommended because of possible damage to mantle heating elements.) In addition to reducing fire hazards, the Poncho Shield also protects flasks from falling objects such as screwdrivers or pliers, protects personnel from flying glass and liquid if flask implodes under high vacuum distillation or explodes, and serves as an efficient insulator. The Poncho has two glass observation ports, allowing the material being heated to be seen while still affording protection. The shield is furnished with a sealer ring and an NPT purge relief port (1/8" for sizes P1300 and smaller and ®" for the others). Ponchos listed are for single-neck flasks and are shipped ready for use. Ponchos for multiple-neck flasks are available.