Epson SureColor F2100 Series User Manual page 48

Attach only spacer a for fabric with a thickness between 0.2 to 0.5 inch (5 to 13 mm).
Attach only spacer b for fabric with a thickness between 0.35 to 0.67 inch (9 to 17 mm).
Remove both spacers for fabric with a thickness between 0.59 to 0.95 inch (15 to 24 mm).
• When using the sleeve platen or medium-grooved platen:
Attach only spacer b for fabric with a thickness of up to 0.31 inch (8 mm).
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