Holder for glassware with NS29, plus lock

The module corresponds to the module holder for glassware with NS29, but is also equipped with a rotatable locking ring, through which the glassware with standard cut NS29 is additionally protected against falling out.Note on cut tolerances for NS29,Maximum outside diameter at the narrowest point of the taper: 31.4 mm (larger diameters are too wide for the mount and cannot be accommodated),Minimum outside diameter at the widest point of the taper: 32.8mm (smaller diameters are too narrow for the mount and would fall out)