flashlight holder for Jogger

I designed a flashlight holder for flashlights with a diameter of 30mm.
it was fixed with velcro inside the holder, also velcro was used to fix it at the arm.
Hold together by four m4x45 screws
you can buy the velcro for the arm here:
https://www.amazon.de/Sportsarmband-Reflektorb%C3%A4nder-Bodyreflektor-Reflektierenden-Motorradfahren/dp/B01FQNCJR2/ref=sr_1_2?ie=UTF8&qid=1478789472&sr=8-2&keywords=klettband%2Bjoggen&th=1