Cole-Parmer PTFE Dippers feature almost total chemical resistance to most chemical compounds. Additionally, PTFE material is stable from -328 to 572°f (-200°c to 300°c), making it suitable for a wide range of applications. Material is high purity and totally inert preventing contamination. SHAFT is ptfe-encapsulated steel; extra shaft can extend Length. Dipper can be sterilized via Autoclave or gamma irradiation. PTFE material offers almost total chemical resistance non-stick surface leads to easy recovery of contents stable over a wide temperature range material is compliant and USP Class VI approved.