Lego NXT Ultrasonic Sensor (9846-1) TESTED AND WORKING 797734812220 | eBay
LEGO Harry Potter Hogwarts Castle 71043 Building Set - Model Kit with Minifigures, Featuring Wand, Boats, and Spider Figure, Gryffindor and Hufflepuff Accessories, Collectible for Adults and Teens - Walmart.com
Lego NXT Ultrasonic Sensor 9846 | eBay
Lego NXT Ultrasonic Sensor (9846) for sale online | eBay