Transmission oil cooler 3/4 x 10 x 15-1/2. Heavy duty. Imperial Econo-Cool transmission oil coolers are ultrasonically soldered for reliability and are 100% pressure-tested to ensure quality. Product Features:Imperial Econo-Kool tube and fin transmission coolerSize: 3/4 x 10 x 15-7/8Class A motor homes, large travel trailers, 5th-wheel trailersGVWR up to 26,000 lbs.; towing up to 10,000 lbs.