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Double-sided textured PEI powder-coated spring steel sheet
https://help.prusa3d.com/ja/article/textured-steel-sheet_196534
Double-sided Powder-coated Satin Spring Steel Sheetよりも粗い

ここで買える
https://shop.prusa3d.com/en/accessories-mk3s-mk25s-mini/214-powder-coated-spring-steel-sheet.html

PETGを印刷するとき、冷えるとほとんど自動的に剥がれて便利
>Ideal for extensive printing of PETG, CPE, TPEE/TPU.