We have just measured one, it fits the required criteria in length and diameter. The trunks must be left out to dry for up to 18 months. ($1 = 0.8432 euros) So far, so good. There is in fact one other requirement: Patience.
it contains less than a total of 18 letters.
( z0 contain :ARG0 ( z1 it ) :ARG1 ( z2 less-than :op ( z3 letter :quant 18 :ARG2-of ( z4 total ) ) ) )
(z0 / contain-01
    :ARG0 (z1 / it)
    :ARG1 (z2 / less-than
              :op1 (z3 / letter
                       :quant 18
                       :ARG2-of (z4 / total-01))))
it contains less than a total of 18 letters .
z0 :ARG0 z1
z0 :ARG1 z2
z3 :quant 0
z3 :ARG2-of z4
z2 :op1 z3