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.
Steel Security Door Costs. Doors that are exterior facing must close against weather and intrusion. A common choice for a security door frame material is steel. You will find that the cost to install average steel security doors depends upon material and finish grade, size, structural preparation and special needs, and the labor rate.