The 200L large drum is made from 316L stainless steel with the entire body finely mirror polished inside and out. The clean, dead-corner-free inner wall greatly reduces photoresist and etching chemical adhesion and residue, strictly controlling metal ion leaching — suited to high-purity electronic chemical storage. The rigid body withstands stable operating pressure over the long term, and the side lifting structure suits forklift transfer. Its temperature and pressure performance meets wafer fab mass production needs, enabling sealed, clean warehousing and delivery of large volumes of media.