The 20L storage drum is made from highly corrosion-resistant 316L stainless steel, with the body electrolytically ground and mirror polished inside and out. The exceptionally smooth, pore-free inner wall greatly reduces photoresist and electronic cleaning solvent clinging and residue, controlling metal impurity leaching at the source. An integrated side handle suits manual transfer, and the narrow sealed opening blocks light and dust. Stable temperature and pressure performance suits cleanroom production, making it suitable for routine batch material storage and delivery on semiconductor pilot lines.