10/(15)/20/40/80 End fed antenna kit 250 Watt including 1:49 impedance transformer - HF kits
EFLW-3K – MyAntennas.com
Snap On End Fed Feed Line Choke for Non-Resonant and End Fed Half Wave Antennas, RG8X, RG8, up to 38 dB common mode suppression - End Fed Long Wire Antennas - Palomar Engineers®
End Fed Half Wave Antenna Coupler (EFHW) – M0UKD – Amateur Radio Blog