The Spot lens is used on distal ends of gooseneck and bundle fiber-optic pipes to focus the light. The Schott number is A08080 and the units are new. The A08080 slips onto the distal ends of all of Schott-Fostec standard fiber optic bundles except models, A08051.40 and A08051.60. For use with other manufacturers bundles, the distal end can not exceed 9.9mm in diameter. THE SALE IS FOR ONE EACH LENS. Thanks for looking!