Single head -12CM (4.72 '')
Single head -15CM (5.90'')
Double headed -30CM (11.81 '')
Three headed -30CM (11.81 '')
Four headed -40cm (15.75'')
Five heads -50cm (19.68'')
Six heads -60cm (23.62'')
10-16 heads -80CM/31.50'' (specific number of holes needs to be noted)
10-16 heads -100CM/ 39.37''(specific number of holes needs to be noted)