This is a SYSTEM 3 TOUR125 s. - Model Name: SYSTEM 3 TOUR125 - Flex: S 4I-94.2 5I-93.0 6I-91.6 7I-90.3 8I-88.8 9I-87.6 PW-86.2 Units are in cm. The 4-iron was used without any adjustments. The 5-iron through pitching wedge were used with a two-club flex adjustment towards the softer side. The flex is roughly equivalent to SR. Thank you for viewing. Thank you for your consideration.