Marathon Flat Free Quick-Seal Replacement Inner Tube - 4.00-6" / 13x5.00-6" - Pre-filled with Flat Free Tire Sealant For a 4.00-6" or 13x5.00-6" Tire Repair your flat tire, seal punctures and prevent future leaks-all with one tube Sealant will seal tube punctures up to 1/8" Tube is pre-filled with Flat Free Tire Sealant Sealant will not free or dry Repair your flat tire, seal punctures, and prevent future leaks - all with one tube For a 4.00-6" or 13x5.00-6" Tire Repair your flat tire, seal punctures and prevent future leaks-all with one tube Sealant will seal tube punctures up to 1/8" Tube is pre-filled with Flat Free Tire Sealant Sealant is Environmentally Friendly-it will not free or dry