Finally, nocks and endcaps designed to fit all Skyshark P90, P100, P200, P300 and P400 tubes! From the 3D printer at Sturdy Designs, these nocks and caps plug into any tube with a .240” internal diameter. Use a drop of epoxy or CA glue to hold them in place permanently, or some hot glue for a temporary hold. Designed to be super strong to avoid breakage during high-impact stresses like tip stabs and hard landings.