Z-FRAME® Nesting Racks by M&E Mfg. Co., Inc.: patented nesting racks for commercial rack ovens and rotating ovens, custom racks in stainless steel and/or aluminum. Extraordinarily strong design and construction features make these ideal for commercial, material handling, or central commissary/extreme duty applications. Whatever your application needs are, we design and manufacture to those specifications using our portfolio of patented features.