Product dimension (L*W*H CM): 39.5*11.8-*34.3
Inner packs dimension (L*W*H CM): 41*36.2*13.1

It is used for students’ grouping determination of bullet velocity experiment in middle school physics teaching, and for level-throwing movement experiment. It consists of counterweight, tabletting, cycloid regulator, pointer, and cycloid, scale plate, rocking block, bullet hole, bullet, gun barrel, bolt, leveler, trigger, bottom and rod.