Davis Recurve Aperture- Black
Has 8-32 threaded rod with hex nut and thumb nut
.019 2 red fiber  pin with 6" long tail wrapped around housing
Will work for both RH and LH, you would just need to remove mount rod and screw in other side.
OD of housing is .75" with .50 ID
ID has a 5 degree taper to center from both sides, to help keep a full circle when aiming
at different distances.
Housing is made of 6061 Alum.