One vertical is made of 3 and 4" aluminum tubing. It is 1/4 wave on 80m. The other plan is for a 1/4 wave on 160, made of either Rohn 25 or 45, preferably the latter. I like the old Lapp style tower base insulators but I'm not sure the pocketbook will survive even if I find one. Tnx, Jim W5QM ________________________________