This heavy-duty grease hose instantly connects directly onto any 3- or 4-jaw grease coupler. 13,775 psi burst pressure. Grease Hose, For Use With Hand and Air Operated Grease Guns, Size 22-1/2 In., Connection Zerk, Max. Pressure 5800 psi, Min. Burst Pressure 5800 psi, Working Pressure 5800 psi, Material Steel/Polyurethane/Rubber, Features Instantly Connects Direct Onto Any 3 or 4 Jaw Grease Coupler, No Need of Threading, Save Time, Includes Grease Fitting This product contains a chemical that is regulated under California Proposition 65. Warning: This product contains a chemical known to the State of California to cause cancer. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. -