Fits Mossberg 835/935 shotguns; Made of 17-4 stainless; Feature a longer parallel section; These choke tubes extend 3/4" outside the barrel eliminating damage to your barrel caused by prolonged steel shot use; The longer parallel section allows for use of larger steel shot in tighter choke constrictions; All steel shot sizes may be used in the close and mid-range choke tubes; Mid Range Choke Tubes - for those situations where you are shooting 25 to 40 yards; Long Range Choke Tubes - for taking shots 40 yards and up; Each choke tube carries a lifetime warranty; Blue finish