SEAT, VALVE: VALVE TYPE BALL, VALVE SIZE 4 IN, MATERIAL MONEL 400+DEVLON, FFT:CONSIST OF SEAT, BALL, AND STEM. 13HT9B0010390 SFERE/OTTURATORI (BALL) QTY 1. 14HT3B0020548 SEAT QTY 2. OXYGEN APPLICATION. SEAT CONSIST OF 2 PCS OF SOFT SEAT WITH THE SEAT RETAINER. OMB REF : EB2017-8-0107, MNFR: OMB FLUICON MNFR PART NO: HAT6BF0080000, SPECIFICATION R3292I0 REV: 1 ITEM NO: 12,21,71