The Primo Extension Rack is made from durable stainless steel and perfectly fits their Oval Large 300 Charcoal Grill. Easily add up to two racks to increase the cooking area. One rack adds over 30% more cooking area and two racks will add over 60%.Durable Stainless SteelOne Rack Adds Over 30% More Cooking AreaDesigned to Fit Primo Oval Large 300 Charcoal Grill