Mitragyna speciosa is an evergreen tree that can grow to a height of 25 m (82 ft) tall and the trunk may grow to a 3 ft (0.91 m) diameter. The trunk is generally straight and the outer bark is smooth and grey.
Overall though, metal is a much better option than plastic. In most cases, it is much more effective and reliable, and the right choice of metal will avoid the pitfalls of rust or weakness. Aluminium, steel and stainless steel are the three metal gutter materials for guards that homeowners can choose from.
Sapele will mill nice, glue nicely, and is a good exterior wood for doors. Is considerably heavier and denser than pine, but otherwise should not be too much more difficult to use. Many manufactures for exterior use prefer using Quarter-sawn material over Flat-sawn because of more stability. Thanks Paul