Polycrystalline silicon no wash No.2 cauliflower material

The performance indicators comply with the solar energy special grade and above wash free standard (GB/T25074-2017). The depth of surface particle indentation is 5-20mm, and the cross-sectional gap is 0-20mm (limited to gaps and holes, no particles are allowed). The appearance is free of color spots, discoloration, oxidation interlayers, and visible pollutants.