Making sure your car is always topped off with the proper fluids is an important maintenance detail. The SuperTech R-134A Refrigerant can help you keep your vehicle's cooling system working at top capacity. Perfect for recharging an empty system or topping off. WM811 Stop Leak is recommended to repair common leaks in rubber O-rings and seals. Remember to always wear protective eye wear and gloves while using refrigerant. Requires a new EPA Self-Sealing Valve Recharge Hose or Adapter for old style Recharge Hoses. This item is ineligible for sale or shipping to WA/VT/CA. This item contains R-134a.