Features: The Spill Proof Coolant Filling Funnel Kit can deliver fluids and oil to vehicle, the long burp funnel prevents spills and trap air during refills after a coolant flush. This coolant funnel has a special rotary switch ,different than others, which helps us effectively to control stopping overflow or bubbles.and we marked scale on funnel. The long extension rod is specific made for difficult-to-reach area , it could be used at any angle.The thread reinforcement design make sure the liquid wont leak in any situation. The multipurpose funnel kit contains 5 Adapters, 4 Filler Caps, Two 45 elbows, Two 5 extender and a thick transparent antifreeze funnel. Instruction: First, install the correct-sized adapter into the correct cap. Place the gasket in a downward position. Tighten the cap with an adapter to make sure it doesnt leak. If 45 elbow or extension is needed, place the funnel after the elbow or extension is placed well into the adapter opening. Fill the funnel slowly and carefully with coolant, about 1/3 full. When running the engine with a funnel attached, the fluid level should be at a low position. Keep RPM in an idle position. (Shut down the engine if notice the fluid level rise excessively. Wait for the fluid level to go lower before restarting the engine.) Use a Fluid Stopper for the remaining fluid inside the funnel to flow to the radiator hose by squeezing it and release. After finishing, remove the funnel (and or extension/elbow) & adapter, and close the radiator with the cap tightly. PackageContents: Lid Funnel with Switch 45 Degree Elbow*2 5 inches Straight Extension*2 Large Cap A Medium Cap B Small Cap C Threaded Cap D Large Adapter A with Gasket Medium Adapter B with Gasket Small Adapter C with Gasket Threaded Cap Adapter D with Gasket Threaded Cap Adapter E with Gasket