Square Manhole Cover Gasket Sanitary Silicone Rubber Fruit Wine Tank Manhole Seal Ring

5 major advantages of the product:
1.Does not rust
304 stainless steel material, no rust in humid environment, super oxidation resistance
2.Preservative
304 stainless steel material, combined with nickel and chromium elements, acid and alkali resistance and corrosion resistance
3.Pollution-free
304 stainless steel material does not release harmful substances, environmental protection, non-toxic and pollution-free
4.High hardness
304 stainless steel, 2 times harder than copper, 10 times harder than aluminum
5.Textured
304 stainless steel material, silvery white luster on the surface, 10 years and 20 years as new