About this item:
This simple but precise launcher projects 16 mm steel balls at ranges suitable for use on the bench top or from the bench to the floor. 
A protractor and plumb line make it easy to set any required launch angle from 45° downwards to straight up. Three different spring tensions give three repeatable launch speeds (ranges of 1m, 1.5m, and 2m) and a magnetic piston ensures that the ball does not touch the side of the barrel and launches straight every time. A cable release gives a smooth triggering to prevent jerking. The unit can stand on its own or be fixed to the bench with a clamp.
 
Specifications:
Length: 18.5 - 30.5 cm, depending on attachment point
Height: 11.5 - 25.5 cm, depending on angle adjusted
Width: 15 cm
Release cable length: 28 cm
Steel ball diameter: 16 mm
Weight: 860g