Evergreen – #4505 6,3mm X 6,3mm OPAQUE WHITE POLYSTYRENE SQUARE TILE, 15 x 30cm

1/4″ (6.3 mm) X 1/4″ (6.3mm) SQUARES, X .031″ (.77mm) GROOVE SPACING.
.040″ THICK.
HEAVY GROOVE FOR TILE.
GROOVE SPACING IS CENTER TO CENTER