A rail spike, also known as a railroad spike or track spike, is a large nail-like metal fastener used to secure rails to the wooden or concrete ties (sleepers) in the construction and maintenance of railway tracks.
The manufacturing process of ductile iron pipes is made by adding magnesium, calcium and other alkaline earth metals or rare metals to the raw materials of ordinary cast iron pipes.
Sexy heart shape mesh splicing design show you the charm when doing yoga, exercising, running, fitness. It was manufactured by QunJian sportswear factory. Price US$8-15/piece