KICK’S ULTRA BLUE PENETRATING CHOKE TUBE AND GUN LUBE1 OZ JARUse UltraBlue on the threads of your screw-in choke tube to help keep them tight while in use. Specifically designed for use with shotguns and other firearms, UltraBlue can be used on any moving parts. UltraBlue is a synthetic grease that is formulated to not become gummy in cold weather or runny during hot weather. It stays where you apply it. This syringe is refillable with the purchase of the 10 oz.jar of UltraBlue.AUTHORIZED KICK’S CHOKE TUBE DEALER Add a map to your own listings. FREE Trial!