Master Lock Steel Cable with Looped Ends, 15 ft. Long 72DCC - The Home Depot
Amazon.com : Lockdown 15 Inch Cable Gun Lock with Non-Marring, California DOJ Approved Design and Keyed Padlock for Secured Storage of Rifles, Pistols or Shotguns, Green : Sports & Outdoors
Cable Gun Lock with Key (15″) – Keyed Alike – California Approved Safety Device – Secures Pistol, Rifle, Shotgun, Revolver, and Other Firearm Types (5 Pack) – Premium Tactical Supply
Amazon.com: Lockforall Cable Gun Locks with Keys - Keyed Alike 15" Cable for Pistols, Handguns, Rifles, and Shotguns, Home and Storage for Firearm Locking and Safety, DOJ Approved (15"5pack) Black : Sports