Collinear-Phased 5/8 Wave Elements. This high performing, 4′ VHF antenna is infused with the quality of our incomparable Phase III™ electronic elements. The commercial grade antenna is great for hardtops, T-tops and other locations aloft where the compact size can deliver reliable communications via VHF radios. The master craftsmanship of the ethafoam spacer system in the fiberglass radome positions this antenna within our finest line.