Features 1,Suitable for 4074, 4082 RC motor 2,With good heat dissipation performance, a perfect water cooling jacket for motors 3,Made of high grade metal material, which is solid, wear-resistant, durable and eco-friendly 4,Fine in workmanship, east to install and remove 5,Great accessory for RC boat Specification Features: Suitable for 4074, 4082 RC motor. With good heat dissipation performance, a perfect water cooling jacket for motors. Made of high grade metal material, which is solid, wear-resistant, durable and eco-friendly. Fine in workmanship, east to install and remove. Great accessory for RC boat. Specification: Condition: 100 percent Brand New Item Type: RC Accessory Material: Metal Color: Purple Inner Diameter: 40mm / 1.6in Length: 50mm / 2.0in Size: 47 x 47 x 50mm / 1.9 x 1.9 x 2.0in Suitable for Motor Type: 4074, 4082 Copper Mouth: M5 Weight: Approx. 51g Package list: 1 x Water Cooling Jacket Package List Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin