PROLUBE 43720 FLEXIBLE GREASE GUN HOSE, HEAVY DUTY, 5800 PSI, 12-INCH, 1/8″ NPT SUPERIOR CONSTRUCTION – INNER TUBING IS POLYAMIDE WITH POLYURETHANE SHEATHING, REINFORCED DIAGONALLY IN HIGHLY TEAR RESISTANT POLYESTER. HOSE HAS AN INNER DIAMETER OF 0.16″ (4.1 MM) & AN OUTER DIAMETER OF 0.425″ (10.8 MM). LARGE INNER DIAMETER MAKES THEM IDEAL FOR USE IN COLD WEATHER. HEAVY DUTY ZINC PLATED END CONNECTIONS HYDRAULICALLY CRIMPED TO THE HOSE. ROLLED THREADS FOR EXTRA STRENGTH. WORKING PRESSURE: 5800 PSI ; BURST PRESSURE: 13,775 PSI