Receiver apertures sight discs

Inventory is up to date.
 

Lyman long shank apertures. Fits Redfield, Lyman receiver and tang sights and possibly Williams.   
All different aperture and OD dimensions please see below. All are 12-40 or 7/32-40 thread. All are NOS. Shipping is lettermail in a reinforced envelope. No tracking.

If you need a bigger aperture size, I can bore them out for you. Please specify the size you’d want. 

Aperture size x outside diameter.  
$12ea shipped. 
- .038”x .324”.  (7)
-.046”x .321”. (1)
-.050”x.321”. (1)
-.054”x.321”. (3)

$18ea shipped
-.029”x.383”. (2)

$22ea shipped.   
-.037”x633”. (2)
-.035x.698”. (2)
-.054”x.698”.  (4)
 

Quantities in brackets,  OD looks to vary but only a few thousands of an inch for each respective size.