19T505 up for sale is a nice plastic housing panel mount incandesent bulb type lighted indicator lamp ,great for many industrial and other projects to show something is on.  red color lens , lens screws off to replace the lamp ( lamp is not included ) takes a bayonet type incandesent lamp we are not sure the exact type , this can be used for 12 volt or higher voltage is different lamp is used internally , the total length is 2.150 just over 2 1/8 from top to bottom of wire hook up point , the barrel measures 0.670 odd size it does have flat to make it anti rotate   , this has a nut and lock washer to hold it on the panel tight , the ruby colored end has a diameter of 5/8 on the knurled part. lens appears to be plastic material .  the height from the panel up when mounted is just over 1/2 inch, nice lamp holder for many uses , nice chrome look with nice red bubble lens , comes as shown in the photos ,