There are three types of projectiles available for the cleaning of hose, tube, or pipe - Standard/Coupling, Abrasive, and Grinding.
Standard & Coupling Series For the cleaning of hoses, tube, and/or pipe with or without couplings.
Abrasive Series For the cleaning of metal tube and pipe to remove light rust and scale. The projectile is recognized by the abrasive pad fixed to one end of the projectile.
Grinding Series For the cleaning of metal tube and pipe to remove heavier rust and buildup from the internal surface. The projectile is coated in carborundum for the full length.
NOTE: When ordering projectiles, please be sure of the inside diameter of the hose/tube/pipe you are to clean.