Nordent amalgam carriers are the only ones with an unconditional 2-year guarantee. The “Mini” barrel has an inside diameter of 1.5mm and is 5mm deep. The “Regular” barrel has an inside diameter of 2.0mm and is 5mm deep. The “Large” barrel has an inside diameter of 2.7mm and is 5mm deep. Our most popular pattern! The “Jumbo” barrel has an inside diameter of 3.0mm and is 5mm deep.