Our products are made with 100% high-grade polyethylene resin. Chipboard 4x4 1X Heavy 50pt 25pcPk Blackitem 1 Chipboard 4x4 1X Heavy 50pt 25pcPk Black. $12.25. Free shipping Easy to Use: Corbels attach easily to the existing wall mount brackets that come with the Nantucket window boxes Long Lasting Quality: The resin used to create our products contains built-in UV inhibitors that reduce the damaging effects of the sun - this ensures that your product doesn't fade, preserves its color and increases its overall lifespan Mayne Nantucket Corbels - Black - 8in L x 4in W x 7in H - 2-Pack - Decorative Use Only, Made with Polyethylene (4828-B) : Plant Window Boxes : Tools & Home ImprovementAbout this item Durable Decorative Brackets: We use 100% high-grade Polyethylene resin in the manufacturing process - which makes our products lightweight and durable Four Season Use Wall Brackets For Shelves Mayne Nantucket 8" X 4" X 7", 1.4 Lbs., Polyethylene Corbels In Espresso 2 Pack Decorative Shelf Brackets Nantucket Decorative Brackets to be used with the Nantucket Window Boxes ( 4829, 4830, 4831, 4832). Mayne Inc. Nantucket 6ft Window Box Outside Dimensions: 8in L x 4in W x 7in H; Wall Thickness: 0.125in; Weight: 1.4lbs; Material: Polyethylene - Mayne offers a 15-year residential warranty or a 5-year commercial warranty on this bracket. Four Season Use: These brackets are resistant to high impact, chemicals and extreme weather conditions - this product stands true to its 'four-season use' tag with very little winter preparation - Brackets attach easily to existing wall mount brackets that come with the Nantucket window boxes.