Kids arrows back part

Wanted to make additional "arrows" for kids crossbow. This part is only back part that goes in round arrow part from other games/collections we already have on hand. For arrow head, we're using foam Nerf gun bullets. Printed in PLA basic, and working great. I've included STL file if you need to change dimension for inner part of tube. This one is modeled on thinkercad in few iterations. This is thight fit and no need for glue, but you can use superglue if you want.