Republic Blower Systems offers 2-in., 3-in. and 4-in. stainless steel air knives for food applications and 2-in. and 3-in. aluminum air knives. The company manufacturers the products on site and offers customized solutions, including various shapes such as rectangles and squares to allow the product to pass through the air knife. Customized air knives can span up to 196 in. long in either aluminum or stainless steel.