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.
But Science: stainless steel is not a super-hard material. The 316L grade used in Apple Watch is actually softer than the 7000 series aluminum used in Apple Watch Sport. If youâre curious as to where 316L is positioned within grades of stainless steel, check out this helpful chart.