CTU-415 (4" Harmer Union), 831,Stuffing Box, 832,Upper Diaphragm Plate, 833,Spring Rest, 834,Spring 5-12 psi, 835,Diaphragm Plate, 836,Clamp Ring, 837,Upper Seat, 838,Washer, 839,Tank Seal Washer, 840,Seat 1-1/4IN, 841,Bushing, 842,Lower Seat, 843,Upper Diaphragm Case, 844,CTF-402 (4" - 150 lbs RF Flange),