This is a small red LED in a black right-angle holder. The pins will fit in a standard 2.54mm grid, but the holders are slightly smaller (about 4.5 mm wide).
This is a surplus product. It was obtained from a surplus store, from an inventory or from any other secondary source. You can expect this product to be in good working condition, but it can show signs of being handled, shipped, repackaged etc. The supply of a surplus article can suddenly run out, or the price can change. Get it while it is available.