- A paste carrier is an instrument used to fill root canals , either with paste, cement or seals, designed with a cone-shaped spiral to prevent air from entering the bubbles, thus reducing the risk of rupture . - 2/100 tapered design to improve material distribution and air bubble release during use. - Manufactured from spring stainless steel with tightly wound safety coils at the base of the shank. - Set: 4 paste carriers ( 25, 30, 35, 40).