CL402RG: Manual top operator (Aluminium handle / body, Viton A o-ring and Z/P steel internals).
CL402RGZ: CL402RG comes with NBR cork gasket and fibre washers.
CL402RGAT: Manual top operator (Aluminium handle / body, Teflon o-ring and S/S steel internals).
CL402RGATZ: CL402RGAT comes with Teflon gasket.