BSA Bore Sighter Kit with Arbors in Soft Case, Clam Pack: * Fits shotgun gauges 10, 12, 16, 20, 28 * Shotgun arbor not included * Will not fit .410 shotguns * Includes 15-size arbor assortment with case * Dimensions: 11.3"L x 8.2"W x 2.7"H * Model# BS30CP