Corn skin monolithic thickness of about 1 5 cm Corn skin without filling thickness of about 3 cm Corn skin silk thickness of about 7 cm Pu grass monolithic thickness of about 1 5 cm Pu grass without filling thickness of about 3 cm Pu grass silk thickness of about 3 cm Pu grass silk thickness of about 3 cm Pu grass silk thickness of about 3 cm Pu grass silk thickness of about 3 cm Pu grass silk thickness of about 3 cm Pu grass silk thickness of about 3 cm pu grass silk thickness of