ck303ITEM #: CK-CK303--Sizing. Junior contoured fit - contemporary; Center back length: 26 Details. Stand collar; Long sleeves with ribbed cuffs; Center front zip closure; Slanted front shoulderPipe; Cosibelimab; Olafertinib; CK-103; CK-302; CK-303; Cosibelimab: An Anti-PD-L1 Antibody. Cosibelimab (CK-301) is a human immunoglobulin G1 (G1) monoclonal antibody