High resolution high polished interior finish offers minimum pellet deformation. The Spectrum Choke Tube extends from the muzzle and features a colored choke constriction band that is laser engraved with choke size for easy choke identification at a glance. The Spectrums also have choke tube wrench slots under the colored band and a knurled band for hand removal. Notes:It is Recommended by the Manufacturer that steel shot not be fired through chokes having a constriction Tighter than Improved Modified FeaturesHigh Resolution RMS Interior Finish Choke Laser Marked on Color Coded Band Also Fits Current Franchi Imported by BenelliHeat TreatedExtends Beyond the Muzzle .812"