RFU507-SI is the part number for 9913, LMR400 and Davis's Buryflex (tm.) you need a crimp tool with .429" for the shield and .128" for the center pin 73, Craig Clark, K1QX RADIOWARE AND RADIO BOOKSTORE PO BOX 209 RINDGE NH 03461 603 899 6957 WWW.RADIO-WARE.COM