2-Pack: Mid Range and Long Range choke tubes; Fits Mossberg 835/935 shotguns; Manufactured from 1704 stainless steel; Designed to throw tighter and denser patterns than conventional choke tubes; Feature a 25% longer parallel section in the choke, thus throwing more consistent patterns; Each choke tube is knurled on the end to allow for quick and easy removal; The constriction and size laser marked on the end and body for easy reference; 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