Hatsan Power Spring for Model 55, 60, 65, 70, 75, 80, 85, 88, 90, 100

License required spring that fits the following Hatsan models as below.

Springs and internal alterations to weapons shall only be performed by a qualified person.

M55
M60
M65
M70
M75
M80
M85
M88
M90
M100
M105
Output speeds according to the manufacturer:

Caliber Output Speed: *
4.5mm / .177 cal 300m / s (1000fps)
5.5mm / .22 cal 230m / s (700fps)
* The initial speed may vary depending on the weight and shape of the ball.

Specifications:
Length 335mm
Outer diameter 19.4mm
Inner diameter 12.7mm
Number of turns 43 turns
Wire diameter 3.1mm