This is an upgrade I always make to all the telephones I sell as it improves the sound quality quite considerably. This comes with a Diaphragm and two stainless steel BA screws. You can use the old style No 18 or the later style No 23 Ear cap with this. To get the best sound quality you would be advised to change the ear cap to the No 23 as the three little holes direct the sound in a concentrated area. This is a generic picture as I sell lots of them. I will inspect each one before it is sent out.