Product DescriptionKeep your gas-operated autoloading shotgun running reliably with the Carlson's Graphite-Coated Gas O-Ring Assortment Kit. Designed for long-lasting performance, these rubber gas rings feature a graphite coating to help reduce friction and wear in the gas system. This assortment is compatible with 12 and 20 gauge platforms (with 20 gauge rings fitting most 28 gauge shotguns) and is intended for use with many popular gas-operated shotgun models that utilize a gas O-ring.Product Highlights Graphite-coated gas O-rings help deliver long-lasting performance in autoloading shotgun gas systems Assortment kit includes 6 performance gas rings for convenient maintenance and replacement Compatible with 12 and 20 gauge shotguns; 20 gauge rings fit most 28 gauge shotguns Works with many gas-operated shotguns including Remington 1100/11-87, Beretta, Winchester, Franchi, Tri Star, EAA and more Made in the USASpecs Product Type: Gas O-Ring Assortment Kit Gauge Compatibility: 12 Gauge, 20 Gauge (20 gauge rings fit most 28 gauge shotguns) Kit Contents: 6 performance gas rings (2 for 20 gauge, 4 for 12 gauge) Material/Finish: Rubber, graphite-coated Compatibility: Remington Model 1100, 11-87, Pro Bore Guns, G-3 models; Beretta; Winchester; Franchi; Tri Star; EAA; and other shotguns using a gas O-ring Country of Manufacture: USA UPC: 723189000660 Manufacturer Part Number: 00066 Brand: CarlsonsDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.