Solex 30PAAI; 30PAAI-2; 32/35APAI-2; 40PHH; 40PII; pump diaphragm   P/N 11314

This diaphragm has the larger, 30mm centre discs 

See Images for dimensions 

Screw hole centres vertical and horizontal 35mm [1.385”]

Screw holes centres across centre of diaphragm 50.8mm [2”]

Height of button/stem 10mm [0.4”]

Centre steel discs 30mm Dia.

For smaller, 22mm centre disc see SD1220