Everflow Supplies NPBA1200 Type B Assortment of 66 Black Coated Nipples with a Diameter of 1/2" Overflow product code NPBA1200 Slant tray with assortment Type B of nipples 66 Black coated nipples with a diameter of 1/2 inch Different lengths, ranging from 1-1/2" to 6", with 1/2 inch increments, including close 6 nipples of each length