DL1: 

Pocket Compass Model DL-1

Main technical parameter

Precision of long air level: 15' ±5' /2mm

Precision of circle air level: 30 ±5' /2mm

Reading error of angulometer:<0.5"

Weight: 0.27kg

Dimensions: 85x73x33mm

DL8:

Main technical parameter:

Precision of long air level: 20' ±5' /2mm

Precision of circle air level: 30 ±5' /2mm

Weight: 0.24kg

Dimensions: 80x70x33mm