Sullair Air Compressor Oil Cooler 24" X 13" Single Pass Oil Cooler with 3/4" Female NPT 20" x 16 1/2" Universal Hydraulic High Flow Oil Cooler 16 3/4" x 12" Single Pass Oil Cooler with 3/4" Female NPT 21" X 9" Single Pass Oil Cooler with 1/2" Female NPT 25 1/4" x 24" Double Pass Oil Cooler with 1" Female NPT 19 1/4" x 18" Single Pass Oil Cooler with 1" Female NPT 23 3/4" x 36" Single Pass Oil Cooler with 2" Female NPT 33 3/4" x 36" Single Pass Oil Cooler with 2" Female NPT 19 3/4" x 20" Double Pass Oil Cooler with 3/4" Female NPT 18" X 9" Single Pass Oil Cooler with 3/4" NPT 18" X 13" Single Pass Oil Cooler with 3/4" Female NPT 18 1/4" X 6 3/4" Single Pass Oil Cooler with 1/2" Female NPT 18 1/2" X 7" Single Pass Oil Cooler with 3/4" Female NPT 22 3/4" x 36" Double Row Oil Cooler with 2" Female NPT 19 1/4" x 30" Single Pass Oil Cooler with 1" Female NPT 32 3/4" x 36" Double Row Oil Cooler with 2" Female NPT 35 3/4" x 40" Single Pass Oil Cooler with 2" Female NPT 24 1/4" X 19" Single Pass Oil Cooler with 3/4" Female NPT 24" X 25 5/16" Single Pass Oil Cooler with 3/4" Female NPT 30" x 31 5/16" Single Pass Oil Cooler with 1" Female NPT