From the Loftsmith community

12 mm tube joiner, 60 mm

Joins two 8 mm rods or tubes end to end, so a broken stick or a too-short length becomes one long piece. It's a plain round sleeve with a small ridge inside that stops each end from sliding in too far. Change the bore and the length to suit your own rod.

1 part · 4 g · 12 × 12 × 60 mm