Belton Vacuum Tube Socket (VT8-PT) 8 Pin / Octal, Micalex, PC Mount, Long Leads High Quality Belton Micalex PC Mount Octal Tube Socket With Long Leads (3/4) Required Hole: 1 1/4 Mounting Center: 1 1/2 (Oblong Holes) Lead / Tail Diameter: 11/16 Top or Bottom Mount