This Listing is for one (1) ORIGINAL Leviton Lumiline # 476 End Cap, which are required to hold the Lumiline bulb on the Collins 312A-1 Speaker and 312A-2 Console. They are also found in Vintage AM/FM Transmitters display cabinets, jukebox, or other vintage fixtures.The Lumiline end caps were discontinued long ago and they've been generally unavailable for years till Now! They are ORIGINAL 476 deep End Caps, not imported copies (which are NOT UL Approved as the original Leviton caps are) These Leviton LumiLine end caps are the deep design with the C-shaped external contact, are #476I have a very limited supply of these end caps so do not hesitate to order them. It is always nice to have a spare end cap in case you need one! The last photo above shows the end cap mounted on the receiver block which is NOT included in this listing. I do have them listed in another listing if you need a replacement receiver.