This is a Bianchi Baton Holder known as the 7312, model 24017.
The 7312 AccuMold Expandable Baton Holder features a hole in the back for convenient reholstering of extended batons. Molded and contoured trilaminate construction with ballistic weave exterior and Coptex knit lining. Conveniently fits both 2 in. (50 mm) and 2.25 in. (58 mm). duty belts.
Features:
Duke web belt loop for both 2 and 2.25 belt widths
For expandable batons 16-26 in length