UL Label 1
UL Label 1 : (Testing) An identification authorized by the Underwriters' Laboratories, Inc. and affixed to a building material, component, or product, indicating (1) that the labeled article is subject to the follow-up inspection service of UL, or (2) that it is from a production lot found by follow-up inspection to be made from materials and by processes essentially identical to those of representative articles subjected to appropriate fire or other tests