FEATURES -Winchester Mossberg Maverick 88 Browning Invector Weatherby Ithaca H & R Charles Daly O/U Thompson Center-Designed for lead& copper plated shot in 12 and 20-gauge shotguns-Blued finish 3" long tube-Knurled end for easy hand installation-Fits all 2 3/4" 3" & 3 1/2" guns