Hello. Welcome to Futurlec. The electronic components Superstore. To find the component your looking for, either search by Part Number or visit the relative department. Need Help. ACCESSORIES TO3MK - TO-3 Mounting Kit 10 sets Photograph Features Suits TO-3 Devices Includes Mica Base and Mounting Screws Excellent Insulation Properties Dimensions: Length - 48mm, Width - 20mm, Height - 52mm