Replacement Bubble Tube Caps -150 and 100 mm

We understand that Bubble Tube caps get broken or go missing from time to time. Two sizes are available . Both are for Spacekraft bubble tubes only. 

The white cover fits all our 150 mm columns - Our standard, interactive, ball, and bead bubble tube .

The yellow cover fits all our 100 mm columns -  Our sensory centers, portable and battery bubble tubes.

100mm diameter or 150mm diameter.