diff --git a/src/pyg4ometry/geant4/solid/EllipticalTube.py b/src/pyg4ometry/geant4/solid/EllipticalTube.py
index b081ad113..3b6429024 100644
--- a/src/pyg4ometry/geant4/solid/EllipticalTube.py
+++ b/src/pyg4ometry/geant4/solid/EllipticalTube.py
@@ -85,9 +85,9 @@ def mesh(self):
 
         luval = _Units.unit(self.lunit)
 
-        pDx = self.evaluateParameter(self.pDx) * luval / 2.0
-        pDy = self.evaluateParameter(self.pDy) * luval / 2.0
-        pDz = self.evaluateParameter(self.pDz) * luval / 2.0
+        pDx = self.evaluateParameter(self.pDx) * luval
+        pDy = self.evaluateParameter(self.pDy) * luval
+        pDz = self.evaluateParameter(self.pDz) * luval
 
         _log.info("ellipticaltube.pycsgmesh>")