Part Number: H221APM (Horizon gyroscope)Part Number: H221AUM (Horizon gyroscope)Part Number: H221BDM (Horizon gyroscope)Part Number: K3385-02 (Horizon gyroscope)Part Number: K5048-01 (Horizon gyroscope)Part Number: K5048-02 (Horizon gyroscope)Part Number: K5048-03 (Horizon gyroscope)Part Number: KG253 (Horizon gyroscope)Part Number: KGS305 (Horizon gyroscope)Part Number: KI258 (Horizon gyroscope)Part Number: RCA21-15 (Horizon gyroscope)Part Number: RCA21-21 (Horizon gyroscope)Part Number: RCA22-9 (Horizon gyroscope)