Diamond or Rexnord are your best bet, stay away from China or any Asian import. Cheaped out years ago on chains with imports cost me a lot of new sprockets that were NH pricey. Always put 2 1/2 links on any new chain, gives you some room for adjustment. For longevity on chains oil them at the end of the day,go with a good brand of chain oil. Make sure the chains are clean ,air or wire brush, before oiling.