Radiata Premium Grade Griptread Decking 90 x 21mm SKU: 635404 Sorry, there is currently no online price available for this product.Contact your local store for pricing and availability. Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants Pine decking is a popular option that also provides a classic, quality look. These boards are of a premium grade. Features and benefits H3.2 treated Radiata. Griptread. Easy to stain. A New Zealand grown renewable resource.