Ski Model, Rush, Pro Steer Carbide Length Center, 4inch Angle Center, 90° Package quantity, Pair Included U blades, Yes Number, 115435 Compatible Brand, Kimpex, Fits PolarisSquare Rod design for aggressive riders and for increased side load in corners. Its an essential part of the traction and control of your sled. These carbide runners meet OEM specifications and are available in 60° and 90°. Theyre also sold by pair.