200 Series High Ace Resyace 6.3 inches (16 cm) Rear Speaker Baffle Waterproof MDF material. Made from water-resistant Type 1 MDF plywood, so there is no need to coat it with varnish or can spray. For 6.3 inch (16 cm) speakers, we recommend 5.0 inches (128 mm). Price is for one set of 2. All accessories are shown in the picture. Specifications: Material: Type 1 MDF plywood (water resistant); Thickness: 0.3 inches (8 mm); Size: 6.3 inches (16 cm) speakers, inner diameter 5.0 inches (128 mm); Accessories: 2 units, Note: When installing too much load may cause damage to the product, so we recommend that you make sure to drill a hole in it. Note: Inferior products made overseas. Our products are manufactured in Japan with the standards of JIS and we are confident in the quality. Note: Although it is made at a domestic manufacturing facility, please understand that there may be some scratches on rare occasions.