GB3000 MC8355 FRU: 60Y3257 USE FOR X220 T420 T520 X230 T430 T530 W520 W530 Only use for Full size MINI PCI-E interface, Do not use for NGFF interface, Do not use for desktop computer Only USE FOR :L420, L421, L430, L520,L530, T420, T420i, T420s, T420si,T430, T430i T430s, T430si, T520, T520i, T530, T530i, W520, W530, X121e, X130e, X131e , X1, X220, X220i, X220 Tablet, X220i X230 X230i Table DO NOT USE FOR HP & DEL & OTHER LAPTOP