With the mount, HD spring, and 102" SS whip is approx 108". A99 is 17'-0". An A99 is 1/2 wave, where 108" is 1/4" wave antenna. A99 is fiberglass, a 102" is stainless steel. 1/2 wave should out perform a 1/4 wave. Wind load of a 102" is less than 17'-0". Can straighten SS Whip with a hatchet, fiberglass you cannot. Can polish SS Whip with steel wool, sand paper, or a file....obviously with fiberglass you cannot. A99 has 3 sections, 102" whip is one piece. You can beat your little brother with a 102" whip and straighten it back out...an A99 will shatter into splinters, and with any luck some will be embedded in his ass.