Buyer Beware! The nylon standoffs on the HD Stacker antenna deteriorate, become brittle and break from UV rays. Thus, the flat antenna lead wire blows in the wind and makes contact with the antenna causing signal loss. You'd think, when designing this antenna, they'd recognize the antenna will be in the sun and not use material that will deteriorate by the sun light. In addition, the matching transformer received with this antenna is not weather proof. I found the rubber boot full of water, thus the coaxial cable connection on the transformer was submerged in water, since the rubber boot does not seal tight. Tried contacting Denny's Antenna Service and I've left messages, but no response what-so-ever from Denny's Antenna Service.