The traps I built using RG58 coax on PVC pipe.

Left to right are:

1. • The 10m (28.15 MHz) trap built on a piece of grey PVC pipe
   

2. • The same trap built on a white 3/4” CPVC pipe coupler
   

3. • The choke/1:1 balun built on a piece of white 3” PVC pipe