Six 9 Pin Heavy White Ceramic PC Board Tube Sockets For 12AX7 6DJ8 7199 6AN8 6CA4 # 90768X6

Sturdy white ceramic one piece body. I measured .833" diameter, .421" height of the ceramic body. Fits an approximately .799 "D" hole pattern.  20 mm Dia.  Set of six tube sockets for 12AX7 6DJ8 7199 6AN8 6CA4 etc.