This 18" box chain necklace is made from recycled stainless steel. Designed to represent the tires we're recovering from the Osborne Reef, the tire-shaped pendant is filled with verified 100% crumb rubber from tires that our crews recovered directly from the Osborne Reef. The tire crumb is set into the pendant with our plant-based epoxy resin. The outer edge of the pendant is etched with tire-tread detail and the back with 4ocean branding. Every necklace purchased supports the growth of the Osborne Reef Tire Cleanup and helps protect our coral reefs.