Stainless Steel Stabiliser Back These Stabiliser Backs are made from Stainless Steel.  They go perfectly with all of the Surgical Steel Earring Stud Posts on our website. Stabiliser disk is made from Phthalate free plastic. 50 Pairs Per Pack. Why use Stainless Steel for Earrings? Stainless steel is much less likely to cause infection or irritation so is excellent for people who are sensitive to some metals. This, plus the fact that it won’t tarnish or rust makes it a great choice for wearing every day. It is also more affordable than other options, even base metal plated findings.