Image Item No. Description  5003305-1  NXT Extended Connector Cables Catalog: Sets: MINDSTORMS: NXT  5003425-1 (Inv)  Rechargeable Battery and Charger 2 Parts Catalog: Sets: MINDSTORMS: NXT  MS1005-1 (Inv)  IR Electronic Ball for Mindstorms NXT 1 Part Catalog: Sets: MINDSTORMS: NXT  MS1036-1 (Inv)  Barometric / Barometer Sensor for Mindstorms NXT 1 Part Catalog: Sets: MINDSTORMS: NXT  MS1042-2 (Inv)  Infrared Seeker (IR) for Mindstorms NXT (Version 2) 1 Part Catalog: Sets: MINDSTORMS: NXT  MS1070-1 (Inv)  Passive Infrared (PIR) Sensor for Mindstorms NXT 1 Part Catalog: Sets: MINDSTORMS: NXT  MS1074-1 (Inv)  Force Sensor for Mindstorms NXT 1 Part Catalog: Sets: MINDSTORMS: NXT