This is a special vial for scope level.
Pictures #1 and #2 were provided by Nathan (Florida) on 6/7/2015 that the scope level was assembled with 1x T1.5x3x16mm green vial. Pictures #3, #4 & #5 were given by Cippy in early 2014 who bought 2pcs 1.5x3x8mm to use as what should be done with one 1.5x3x16mm. We did not have 1.5x3x16mm back then.
A video provided by Kameron (youtube link) is shown below:
We are NOT allowed to possess any firearm here in Taiwan, so naturally I do not have any scope level myself to take pictures with. Thanks to Nathan, Cippy and Kameron....:-)
Length 16.0 mm +/- 1.0
Width 3.0 mm +/- 0.25
Height 1.5 mm +/- 0.25
Apr/8/2016 Thanks to Kameron for his youtube video titled
"Accuracy 1st Anti Cant Rifle Scope Level - Tritium"