Stainless steel flexible conduit fitting is also known stainless steel flexible hose is a product which used widely in industrial and construction. The image as below shows the structure detail one of them.

This one manufactured in stainless steel grade AISI 303

1. Exellent strength and durablility
2. The product was made by stainless steel, so it is really anti rust and increases corrosion resitance.
3. Extremely flexible in any condition of working, it has a smooth characteristic so easy to installation for wire pulling.
4. Interlock (double buckle) style 
5. Able to withstand high temperatures
6. Durable crush-proof construction

This product is suitable for corrosion enviroments, including water pumbs, motors, HVAC system, machine tools, electrical housing and cabinetry. It is really good in absorption of motion and vibration.

This four of SUS flexible conduit suppliers below is not meaning that they are most exellent in manufacturing or supplying this product. This is random of search results which I found on the internet.

1. www.flex-tubes.com: Flex Tube - manufacturers and exporters of stainless steel flexible conduit, flexible stainless steel conduit, flexible conduit, industrial steel flexible conduit...

2. www.delikon.com: Type AT is an ultra-flexible, stainless steel small bore stainless steel flexible conduit designed primarily for OEM applications.

3.www.kopex.co.uk: The original and best manufacturers of conduit and cable management systems, accessories, Pipeslice and ducting products.

4.www.adaptaflex.com. Adaptaflex conduits. Flexible Conduit systems including cable protection, metal and plastic conduit and fittings.

This product is common using in industries of Food and beverage production and distribution, Chemical plants and manufacturers, Water and waste water treatment, Pharmaceuticals and cosmetics, Refining and extraction sites, Petrochemical operations, Marine and Coastal facilities, Pulp and paper mills,  and especially using in other corrosive enviroments.

See more about the difference of using 201 stainless steel and 304 stainless steel in applying for products. What kind of them is better? You will have an exactly answer there.
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In field of construction, the SUS flexible conduit was large used for Supply water and drainage in Residential & Commercial, Water Heaters, Water Treatment/Purification/Softening, Connection of Sinks, Toilets, Lavabo and Boilers. Especially to protect the electrical cable underground and in the humidity enviroment, stainless steel flexible conduit can be used for protect electronic and electrical cable, and wire.