Brand New Genuine LEGO® Parts Details     Tread with 20 Treads Small, Tank Tracks Colour   Black   Item Number   x939  Alternate Item No: 43903   Element ID   4180576   Year Released   2003   Dimensions    6.97 x 2.24 x 1.36 cm Weight   5.25g Works with  This Wheel, Tire & Tread fits with the following Wheel: 18976 Wheel 18mm D. x 12mm with Axle Hole and Stud, Solid Brake Rotor Lines 66727 Wheel 18mm D. x 12mm with Pin Hole and Stud, Dotted Brake Rotor Lines 30285 Wheel 18mm D. x 14mm 51377 Wheel 18mm D. x 14mm Spoked 55982 Wheel 18mm D. x 14mm with Axle Hole, Fake Bolts and Shallow Spokes 55981 Wheel 18mm D. x 14mm with Pin Hole, Fake Bolts and Shallow Spokes

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