How to create CylindricalMesh

Hello, I’m having some issues with creating a CylindricalMesh.I want to create a grid of 10 cylinders with a length of 1.55cm and a radius of 0.381cm in the Z direction.The bottom grid has a base coordinate of (0,0, -7.75).
Here’s my code

mesh = openmc.CylindricalMesh(name=‘mesh’)
mesh.r_grid = (0.381,)
mesh.phi_grid =(0.0, 6.283185307179586)
mesh.z_grid = (15.5,)
mesh.origin = [0,0,-7.75]
mesh.dimension = (1,1,10,)

I think I made a mistake but I don’t know how to write it. I hope you can help me.Thanks!!