TEC-HRO screen is an innovative blinder.

Advantages of TEC-HRO screen:

TEC-HRO screen consists of plastic and has a long lifetime (instead of paper)
It has the ISSF-norm of 30 x 100 mm; this you can see on the printed millimeter scale
TEC-HRO screen has a hole with it it’s possible to mount not only on a headband.
You can also mount it on the diopter.

Additionally, you can use the small rings on TEC-HRO screen to measure the size of airgun ammunition group.