We have an old drawing that calls for the material to be: MIL-P-13949/7 (non-woven glass (GR) and polytetrafluoroethlyene resisn) for MICROWAVE applications; p/n GRN0310B1/B1B1C I cannot find a direct sub when looking through the IPC4101 slash sheet index. Can anyone tell me what material is used today for this requirement? Thanks. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------