The silicon wafer box 4 inch carrier is made of high quality and durable aluminum alloy material. After profile cutting, cnc processing, surface hard oxidation oxidation treatment, the overall stability and durability, high temperature resistance, corrosion resistance, and longer service life. No.: DSF20D04-000-R0; Material: 6061 aluminum profile; Dimensions: 4 inches; Number of slots: 25 slots; Dimensions: 118*112*142 mm; Weight ≈ 1.0kg; Verticality / flatness ≤ 0.5mm; Oxidation process : Surface hard oxidation treatment; can be customized according to customer's production process requirements.