This is a replacement magneto rotor designed for motorcycle engines.Model numbers: ZS177MM and ZS194MQ.Material: metal.Dimensions: 102 mm x 40 mm x 22 mm x 17.5 mm.Color: silver.Quantity: 1 piece.Compatible with NC250 and NC450 engines.Fits , Kayo, Boser, Motoland, Avantis, WRX, NCXT, GR7, GR8, X6S, X6M, Motax, FXMOTO, and other models using ZS177MM or ZS194MQ engine configurations.Installation is straightforward and requires no modifications to the. This product is not manufactured by the brand.Model and brand mentions are for compatibility guidance only.