Dental Henry Schein  Mouth Mirror front surface Cone Socket #5 12 in the box.

item number 104-9564

Stainless steel . Sterilizable  by autoclaving , dry heat ,

boiling or cold sterilizing solution 

these fits any number of cone sockets 3, 4, 5 , but please make sure your handles and mirror are the same .
cone socket is more popular and has longer shaft of mirror and simple stem is shorter shaft 
the length of handles are the same 

we also sell mouth Mirror Handle

please check out our Midwest and SS White burs selection