Solar buzzer bars are made from 100% stainless steel and these 2 rod buzz bars will give years of trouble free use in the roughest conditions and yet look and perform as good as when new.
100% stainless steel means exactly that and with Solar there is no compromise.
If stainless steel is joined to plastic or aluminum products (simply because it's cheap to manufacture) something's got to give... and it won't be the Stainless steel!
Of course, stainless steel buzzer bars are more expensive, but they are extremely cost-effective and will outlast aluminum products tenfold, and they will never bend!

Products shown in image
top - 2 rod buzzer bar 6"
middle - 2 rod buzzer bar 8"
bottom - 2 rod buzzer bar 10"