1st Blue cylinder (Shortest)

1st Blue Cylinder is the shortest piece of the blue knobless cylinder set, sold singly as a replacement when one goes missing or gets damaged. The blue cylinders share the same diameter and differ only in height, so one absent piece breaks the graded series and takes the control of error with it. Ordering the exact number is cheaper and quicker than replacing a whole set. For 3 to 6 year olds working with the knobless cylinders.