The Imperial Maxi-Cool XL's plate and fin design offer excellent cooling efficiency in a compact, space-efficient design. Product Features:Imperial Maxi-Cool plate and fin transmission coolerSize: 3/4 x 11 x 11-5/8Class A motor homes, large travel trailers, 5th-wheel trailersGVWR up to 30,000 lbs.; towing up to 10,000 lbs.