Product Details + Fascinations Metal Earth AVIATION CHANDRA X-RAY OBSERVATORY 3D Steel Model KitAges: 14 From steel sheet to museum Quality 3D Models. Simply pop out the pieces and connect using tabs and holes. No glue or Soldering needed.1 SheetDifficulty: Easy5.31"L x 3.35"W x 1.38"HContents:One Metal sheetIllustrated instructions