HobbyStar Water Cooling Jacket For Boat Motor, 36mm, 40mm Size:40mm motor - 56.2 x 48mm 36-45C is the recommended Optimal

36-45C is the recommended Optimal Zone

perfect for a wide variety of rock crawling expeditions

Smaller than a credit card

will not fit standard X-Maxx™

Set of 5 gears

HobbyStar Water Cooling Jacket For Boat Motor, 36mm, 40mm Size:40mm motor - 56.2 x 48mm 36-45C is the recommended OptimalCooling jacket for brushless boat motors with 36mm or 40mm diameter cans. Includes spare o rings. Overall measurements are: 46. 5 x 44mm for 36mm motors up to 60mm in length (3660). 61. 3 x 44mm for 36mm motors up to 70mm in length (3670). 56. 2 x 48mm for 40mm motors up to 74mm in length (4074). 71. 5 x 48mm for 40mm motors up to 82mm in length (4082).