Abstract We study half-BPS surface operators in N $$ \mathcal{N} $$ = 2 supersymmetric QCD in four dimensions with gauge group SU(2) and four fundamental flavours. We compute the twisted chiral superpotential that describes the effective theory on the surface operator using equivariant localization as well as the Seiberg-Witten data. We then use the constraints imposed by S-duality to... https://chefesquipmenters.shop/product-category/glass-tumblers/