Metal Lamp CapsDecorative caps and metal lamp caps ensure bulbs and other fragile lighting components are protected. Charles Richter carries hundreds of styles and varieties of caps and is a leading manufacturing and supplier of these parts. Find quality products made with precision and accuracy for all your metal lighting fixtures. Our decorative lamp caps are available in round, square, oval, and rectangular shapes and in numerous sizes. Like all other lamp parts in our portfolio, these caps can also be custom-made to perfectly meet your special needs.