We need to order diaagm kits for the ZSFM Deluge Valves that was suppleid and installed 2 years ago.Please send me an offer for diaagm kit for the following sizes of the ZSFM Deluge Valve :-a) 4" : 3 sets of Diaagm Kitb) 6" : 1 set of Diaagm KitKindly send your offer byto Best Regards,Chong Y.K