Stainless steel welded ring, interior diameter 15mm, 3mm thickness. Season manufacturing, AISI 316. Available dimensions: Stainless Steel Aisi 316 Øimm SMM Brlkg 15 3 1300 20 4 2000 20 5 3000 25 4 2000 25 5 3000 30 5 3000 30 6 4000 30 8 5000 40 6 4000 40 8 5000 50 6 4000 50 8 5000 50 10 8000 60 8 5000 60 10 8000 75 8 5000 75 10 8000