Check the listing for details. Kimball Physics EGPS-12B Electron Gun Power Supply. Condition: For parts or not working. Listed at 500.00 USD. Kimball Physics EGPS-12B Electron Gun Power Supply. This unit does not power up but fuse tests good. We are selling for parts because we are unfamiliar and unable to work on this unit. For Internal Use:Barcodes: 17053972 Location: 105 Warehouse/Blk Cart CHP Consultants dba CHP Surplus est. 2002 chpconsultants.com We offer 30-day return policy on our inventory. If you are not satisfied with an item, please contact us so we can work out a solution to your satisfaction. Due to the variety of the items, we sell through our store, we are only able to thoroughly test our items labeled as “Radiation Detectors”. We are happy to answer further questions on any item if we can. Please do not hesitate to message us if more information is needed. We are easy to reach during regular business hours. Monday through Friday 9-3.We take pain staking efforts to pack all items quickly and properly for safe shipping.We can consolidate shipping. If you place more than one order and wish to consolidate, simply message us prior to shipping and we can reduce shipping costs. Local pick up is available Oak Ridge, TN.We stand behind our eBay store. Check out CHPSurplus here for various miscellaneous equipment at a low price.