Made of High Quality Meterial, Stronger And More , Improve The Appearance Easy to use,Easy to replace 26mm water jet pump with reverse function Weight: 115g Parameters: 4mm stainless steel shaft, aluminum alloy sleeve, 2 high-speed bearings, 3-blade propeller (2 blades are purchased separately), aluminum alloy motor seat, rear automatic water inlet power supply motor cooling. Applicable motor: brushed 540, 550. Brushless 28, 36 motor Coupling: 4-3.175mm Applicable to 500mm-900mm ship models Size:150 x 40 x 28mm Color:black Material:metal+plastic Package Contents: 1 x RC Car Water Jet Thruster Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.