Fiilada balaastiga ah ee leh birta aan birta lahayn, sidoo kale loo yaqaan fiilada fiilada naylon, farqiga u dhexeeya fiilada naylon ee caadiga ah ayaa been abuur ah in uu jiro hal gabal oo yar oo birta aan la gelin ah oo la geliyo madaxa sare ee tiirarka.Daahfurka birta aan lahayn waxay noqon kartaa SS304 ama SS316.