MB1889G10=3.189in MB1890G10(F)=3.189in MB1891P10=3.189in
MB1889G10=3.188in MB1890G10(F)=3.188in MB1891P10=3.188in
MB1889G10=0.0033in MB1890G10(F)=0.0033in MB1891P10=0.0038in
MB1889G10=0.0007in MB1890G10(F)=0.0007in MB1891P10=0.0007in
MB1889G10=0.0988in MB1890G10(F)=0.0988in MB1891P10=0.0988in
MB1889G10=2.989in MB1890G10(F)=2.989in MB1891P10=2.989in
Grooved Upper Halves, Plain Lower Halves
MB1889G10=2.990in MB1890G10(F)=2.990in MB1891P10=2.990in