This is an anatomically accurate life size right ear pinna with ear canal for DIY binaural microphones.
The canal is averaged over several hundreds of real impression scans, to guarantee your binaural recordings will be enjoyed by virtually everybody listening to them.
It also features a cylinder housing at the eardrum location that will allow the use of microphone capsules up to 6mm diameter (perfect for Panasonic WM-61 capsules, for example).
The geometry of the base is such that it allows continuous variation of the ear angle in respect to the head. This is very useful when trying to find the right balance of front and side sounds getting to the microphone.
The base shape also allows the ear to be flush mounted to the microphone head, for a nice aesthetic look.