As a note, an example in yellow and blue also exists - you'll find it sitting on an aircraft carrier on that page.
Size
Length
Width
Height
106 mm
35 mm
37 mm
4 3/16 in
1 3/8 in
1 1/2 in
The Bullycan Needle Probe bears no markings. As is clearly visible, the soft plastic is rather prone to warping...