Insert 15" diameter pad in funnel or oil pan before oil change in transmission drain funnels or larger oil drain pans, before oil change to eliminate oil splatter. Porous material allows fluid to quickly pass through into funnel or pan. Pad material resists engine oil, transmission fluid, coolant, brake fluid, brake cleaner, gear oil and other solvents. 15” fits all standard oil lift drain funnels and oil pans. Not for coolants or fluids that will be recycled in the vehicle. Material fibers may contaminate the fluid.