CE Certified ISO Certified CDC Approved Model FS-12L Product Overview The PHEFON FS-12L Vaccine Cooler Box is an essential solution engineered for the safe and efficient transportation and storage of vaccines and other temperature-sensitive medical products. Designed to meet the rigorous standards of medical and pharmaceutical logistics, this vaccine chiller maintains an optimal temperature range of 0–10°C for up to 24 hours — a critical capability for preserving vaccine