?? PRE-MEASURED SINGLE-USE PACKS - Includes six ? oz doses for clean, accurate application without overuse or waste | ?? UNIVERSAL SYSTEM COMPATIBILITY - Designed for use with R-1234yf, hybrid, CO2, and conventional A/C systems | ?? FAST, VISIBLE UV RESPONSE - Delivers clear fluorescent detection under UV light for fast diagnostics in the field | ?? SAFE FOR ALL OIL TYPES - Compatible with PAG, POE, ester, and mineral oils to ensure worry-free system integration | ?? SUPPORTED BY MASTERCOOL - Backed by over 40 years of HVAC expertise and U.S.-based technical assistance