Stems
Average length (cm)
Group-1
E1 + E3 + E4 + E6
Group-2
E2
Narrow
5.85 ± 1.54
5.08 ± 0.96
Medium
5.77 ± 1.58
5.02 ± 1.17
Wide
5.46 ± 1.72
4.78 ± 1.12