Actually, stainless steel in spring temper is slightly magnetic. Thus the "magnet test" is not really definitive as it is for nuts and bolts. That is, the light weight ss garter spring will be picked up by a magnet. Just be sure to buy from a reputable source and check the part number for an indicator of having a stainless steel garter spring.
Craig Briggs, SN#68
---In amelyachtowners@..., <yahoogroups@...> wrote :
Yes, these 12mm seals are very common...I bought some in Penang, Malaysia for about $5.00US. You need to ensure, with a magnet test, that the spring is stainless steel...you know about "Chinese Stainless Steel."