This is a A-31-1808 O-Ring PN: 31-1808Main Description As Following : A-31-1808 O-Ring P.N: 31-1808 Condensor Line-Inlet Stocked As: A-013N Found in Section & Models : Air Conditioning Parts > Lines/ Hoses, Case-IH TRACTOR: COUGAR, Case-IH TRACTOR: LION, Case-IH TRACTOR: PANTHER, Case-IH TRACTOR: 9110, Case-IH TRACTOR: 9130, Case-IH TRACTOR: 9150, Case-IH TRACTOR: 9170, Case-IH TRACTOR: 9180, Case-IH TRACTOR: 9210 (S/N