* Patternmaster Short Range tubes will extend out the end of your barrel approximately 1/4" and will throw a pattern similar to a factory improved cylinder pattern. Patternmaster recommends using the short range tube over decoy or inside 40 yards. * Patternmaster Mid Range tubes will extend out the end of your barrel approximately 1/2" and will throw a pattern similar to a factory improved modified pattern on paper. Patternmaster recommends using the mid range tube over decoy or inside 50 yards. * Patternmaster Long Range tubes will extend out the end of your barrel approximately 1" and will throw a pattern similar to a factory full with 2 3/4" or 3" shells. Patternmaster recommends using the long range tube beyond 40 yards with an effective range of 75 yards.