This is a A-A42666 O-Ring PN: A42666Main Description As Following : A-A42666 O-Ring P.N: A42666 On Q.Cplr Half Stocked As: A-116N Found in Section & Models : Air Conditioning Parts > Lines/ Hoses, Case-IH TRACTOR: 1090 Associated Items : New Also A-CA-S-1090ETC, A-SMC203 And : High Quality Afternaket Shipped from Both US and Canada