DEI Cell Saver battery insulation kit protects batteries from harmful radiant heat. Batteries are very susceptible to heat and vibration that could cause premature failure and hazardous leaks. Cell Saver is very capable of damping vibration and will absorb and neutralize any damaging leaky battery acids. Cell Saver is easy to install and excess material can be trimmed to accommodate batteries of most sizes and shapes. Kit includes 40" x 7" insulation material, 12" x 7" treated base mat, and edge sealing tape.