Tapco Pro-Tuff Rifle Rod 36in .22 Caliber. 5mm AR Platform 30" - The TAPCO 30in Double Coated Rifle Rod is great for AR platform rifles. The Double Coated rods are heat-treated centerless ground micro-polished and mirror-polished. This is a great tool to have so your barrel is always protected. Fits .22 CAL - 6.5mm with 30in working length. Specifications for Tapco Pro-Tuff Rifle Rod: Manufacturer: Tapco Fabric/Material: Steel Tapco TAP22077 Double Coated Rifle Rod 22 Cal-6.5mm AR Platform 30" Tapco TAP22078: Pro-Tuff Rifle Rod 36in .22 Caliber