Alphamatraxan object

Sarah Jane Smith had an Alphamatraxan object inside her attic. Mr Smith scanned it for her. (TV: The Nightmare Man)

Behind the scenes
The top portion of this prop originates as the explosive devices used by Klineman Halpen in his attempt to destroy the Ood Brain in Planet of the Ood. The bottom portion appears to be one of the canisters used by John Hart in Kiss Kiss, Bang Bang.