The periscopic electron cones are clear acrylic cylinders which are 3.1 mm thick and 30.5 cm long. The top of each cone has three acrylic spacer rings which slide into the barrel of the periscopic viewer. When the bottom of the periscopic electron cone is flush with the end of the periscopic viewer barrel the distance from the bottom of the periscope to the center of the cone angle is 25 cm. 

A 4.8 mm thick brass plate with a center hole is attached to the top of each periscopic electron cone. The brass plate collimates and prevents electrons from the penetrating the acrylic spacer rings.

Periscopic electron cones that are larger than 3.8 cm I.D. diameter have a 2.5 cm diameter hole in the side of the cone. This hole allows easy access for TLD placement or a fiber optic light source.

The periscopic electron cones are available in angles of 15°, 30°, 45° and 90° (no angle). The inside diameters range from 1.9 cm to 9.5 cm.

Any of the periscopic electron cones will fit in any periscopic viewer made by Radiation Products Design, Inc.

Sterilization: Gas

The Surgical Dummy Cones are used in surgery to select the cone diameter and angle needed for treatment.

The Surgical Dummy Cones are made of 3.1 mm thick clear acrylic and are 25.4 cm long. One end of the cone is flat and the other end is angled to 15°, 30° or 45°.

It is best not to use the Periscopic Electron Cones in surgery because they could be dropped, become non-sterile, or the cone may be become partially covered in blood and would obscure viewing of the field with the Periscopic Viewer.