Stainless steel and carbon steel construction Includes a 7 liter Stainless Steel mixing bowl, dough roller, dough knife, dough scraper, dough hook, dust cover lid, a 3.5 liter BPA/BPS Free Tritan plastic mixing bowl, multi-wire balloon and single-wire cookie whips All metal, chrome plated zinc, speed control and timer knobs Mixes and kneads smooth, silky, elastic dough quickly 7 year manufacturer's warranty on the motor assembly