The 295XP18 is a medium sized, computer optimized, cross-polarized antenna. Depending on phasing between the vertical and horizontal element set, horizontal, vertical, right or left hand circular polarity is available. Electro-mechanical features include machined components and stainless steel hardware. The rod elements are centered in the boom on UV stabilized insulators and secured with stainless steel shaft retainer. All connectors are threaded and O-ring sealed to the feed block. The block's internal cavity and connections are encapsulated in a silicone gel that seals out moisture and provides a dielectric strength 3.7 times greater than air for improved power handling capability. Balun connectors are triple-sealed to the coax and nut-sealed at the block.