|RARE! Refurbished. Tested. Genuine Kingman factory replacement electronic eyes. Fits most Spyder electronic markers including the VS1, VS2, VS3, RS, RSX, Electra, Fenix, Pilot, Advancer and other compatible models. May fit others but no guarantees. 4 wire design with 1 clear eye and 1 black. Has the 4 pin plug. Measures 7.5 inch long.