Best Choice for Filling Automotive Cooling Systems. Fit on Most Domestic and Import Cars and Light Trucks, i.e. G.M, Nissan vehicles… Smart Coolant Filling Funnel for drain refill of the coolant prevent Spills & Trapped Air as coolant filling application, the spill-free funnel eliminates trapped air pockets which usually cause erratic cooling system and heater performance No-Spill Filling Funnel Kit with 5 Caps (adapters) fits on most domestic and import carts, 2 pcs of 45 degree elbow allows use on radiator caps that are placed at an angle and 1 straight extension (5 inch) allow access to caps under shrouds The Spill Proof Coolant Filling Funnel Incorporates a Fluid Stopper with tube for trapped air Tight attach the plastic tube on fluid stopper end to bleeding trapped air pockets out while filling the coolant to prevent unsteady pressure with cooling system. These air pockets accumulate over time can cause overheating by impeding the flow of coolant through the system This Kaupa Radiator Coolant Filling Funnel Kit which is the best Choice for Filling Automotive Cooling Systems which with 5 Caps (adapters) for tit on most domestic and import cars and light trucks, i.e. G.M, Nissan vehicles…. Smart coolant filling funnel for drain refill of the coolant prevent spills & trapped air as coolant filling application, the spill-free funnel eliminates trapped air pockets which usually cause erratic cooling system and heater performance. The Kaupa no-spill filling funnel set is with 5 Caps (adapters) fits on most domestic and import carts, 2 pieces of 45 degree elbow allows use on radiator caps that are placed at an angle and 1 straight extension (5 inch) allow access to caps under shrouds. The spill proof coolant filling funnel incorporates a fluid stopper with tube for trapped air. Please tight attach the plastic tube on fluid stopper end to bleeding trapped air pockets out while filling the coolant to prevent unsteady pressure with cooling system. These air pockets accumulate over time can cause overheating by impeding the flow of coolant through the system.