4×4-1/4″ 5 Ply with Marine Grade Glue (nominal thickness)4×8-1/4″ 5 Ply with Marine Grade Glue (nominal thickness) CHINA Ultraply XL Premium Underlayment Previous postX Pattern for Nailing Underlayment PLYWOOD MADE IN CHINA Next postCHINESE 1/4″ 4×8 UltraplyXL Underlayment PLYWOOD About author View all posts Author website admin