V4 Steck-ES is a very heavy stainless steel plug-in pipe made of W1.4571, in 3m lengths. This stainless steel pipe is used in tunnel construction, in sewage treatment plants, in the food industry and in breweries, etc. The advantages are its high resistance to corrosion and value. VDE 0605 DIN EN 61386-21 Classification: 55571 Minimum compressive strength: 4000N/5cm DIN EN 10088-1, -2, -3 (V4A) AISI 316 TI