Select Class: -- select -- M01-Prelim 1.1 26 - 30 years M01b-Prelim 2.1 26 - 30 years M02-Prelim 1.1 31 – 40 years M02b-Prelim 2.1 31 – 40 years M03-Prelim 1.1 41 – 50 years M03b-Prelim 2.1 41 – 50 years M04-Prelim 1.1 51 years and over M04b-Prelim 2.1 51 years and over M05-50cm M06-70cm M07-90cm M08-26-30 years M09-31-40 years M10-41-50 years M11-51 years and over