170 inner length approx. 16CM180 inner length approx. 17CM190 inner length approx. 18CM200 inner length approx. 19CM210 inner length approx. 20CM220 inner length approx. 21CM230 inner length approx. 22.5CM235 inner length approx. 23CM240 inner length approx. 23.5CM245 inner length approx. 24CM