Lot of 8 boards Good for DIY speaker crossovers, amps, guitar projects etc looks to be Silver plated turrets., on a couple boards they look to have been tinned already but none look to have been used. White insulating teflon or nylon looking plastic Aluminum plate with 4 mounting holes I believe these were surplus from a high end from former military/aerospace contractor May or may not be milspec Note due to poor storage conditions some have light corrosion or tarnish see pictures. one pin is bent, and one the top section, is broken off but possibly can be soldered so it is included 11x7.5 cm 2.12oz