metal teller rosette ring is made by 12 small rings, which invented by American Teller A J in 1956, like a ball surrounded by helical springs which are connedted by end to end. Due to the structured of polycyclic enabling, it will enlarge gas & liquid contacting area and prolong liquid retention time. 

Key features of a metal teller rosette ring:

Irregular Shape:
Plastic random packing consists of small, irregularly shaped pieces or elements, such as rings, saddles, or other three-dimensional forms.
The irregular shape helps to create a high surface area-to-volume ratio, which is important for mass transfer processes.
Randomized Orientation:
The packing elements are randomly oriented and arranged within the vessel or column.
This random orientation helps to create a tortuous path for the fluid flow, enhancing mixing and contact between the phases (e.g., gas and liquid).
Large Surface Area:
The irregular shape and random orientation of the plastic packing elements provide a large surface area per unit volume of the packing.
This increased surface area improves the efficiency of mass transfer operations by facilitating better contact between the fluid phases.
Lightweight:
Plastic packing materials, such as polypropylene or polyethylene, are generally lightweight compared to traditional metal or ceramic packings.
The lightweight nature of plastic packing reduces the overall weight of the packing system, which can be beneficial in terms of equipment design and installation.
Corrosion Resistance:
Many plastics, including polypropylene and polyethylene, are highly resistant to chemical corrosion and can withstand a wide range of operating conditions.
This makes plastic random packing suitable for use in processes involving corrosive or aggressive fluids.
Ease of Installation:
The irregular shape and random orientation of plastic packing elements allow for relatively simple installation within the column or vessel.
This can simplify the construction and maintenance of the packing system compared to more complex structured packing designs.
Cost-Effectiveness:
Plastic packing materials are generally more cost-effective than traditional metal or ceramic packings, making them a practical choice for many industrial applications.