3/4/6 strands twisted rope is produced by PP, PE, Polyester, PP/polyester mixed or polyamide(Nylon). It's small size and commonly used in ship mooring, shipbuilding, deep sea farming, pelagic fishing, mine, water conservancy projects and etc. 

In all kinds of the chemical fiber and natural fiber ropes, polyester rope is with the best UV resistance. It's owns stable chemical performance, good avrasion and chemical corrosion resistance. It absorbs water and keeps same elongation rate and strength when it's under wet condition. It is widely used in marine mooring and sea farming.

PP rope is light weight mooring line, very easy to handle, keep same strength in wet or dry environment.
Widely used in marine mooring, sea farming, ocean kelp and oyster aquaculture farming and pelagic fishing.

Nylon rope is a type of rope made from nylon fibers, a synthetic material known for its strength, elasticity, and resistance to abrasion. Nylon ropes are widely used in various applications due to their favorable properties.

In many cases, chain is coupled with fibre rope, sections of chain on a mooring line provide weight and wear resistance where it is most needed, while fibre sections keep weight down and improve the manageability of the system.