Here is a large 7 1/4" radio strain -- PYREX / MADE IN U.S.A. // PAT number -- just a small ridge chip on the back -- $15 plus actual postage

NOTE: I'm selling these insulators on behalf of the Jim Fielding estate -- PayPal (no fee friends and family) or checks are both accepted - I'll provide instructions. I'll also be handling all the packing and mailing.