The product titled ‘CIRCUITS MOD JACKSN REES-NONREBREATH 20 EACS – 225-3801-300’ is a medical supply item. It includes 20 units of Modified Jackson Rees-Nonrebreath circuits per case. These circuits are designed for medical use, particularly in respiratory care. Please note that the quantity mentioned is per case, indicating that each case ordered will contain 20 units of the product.