Surplus Sales of Nebraska carries a large variety of tube sockets, plate caps, chimneys, tube shields, collars, and testing accessories. Tube sockets for chassis or printed circuit board mounting available in sizes from miniature tubes to medium sized tubes, up to power and transmitting tubes. Caps for electrically connecting the tube grid or plate top cap. Heatsink caps for draining heat off excess heat for better performance. Chimneys to keep your tubes cool by allowing forced air to flow around the tube. Tube shields keep errant radio frequency interference from effecting tube performance.