precise project launcher, 16 mm steel balls at ranges suitable for use on the bench top or from the bench to the floor, protractor and plumb line make it easy to set any required launch angle from 45 deg downwards to straight up
Guinea And Feather Apparatus, Glass Tube Is 50Cm (20in) Long And 16mm Diameter With Two Rubber Bungs, One Carrying Brass, And 40Cm Long Pressure Rubber Tubing To Connect To Vacuum Pump, Includes: (1) Glass Tube, (1) Piece Of Rubber Tubing