When you need a replacement O-ring, the real question is whether the size, material, and hardness fit the part you're repairing. In the seals gaskets o rings category, this Buna 70 Duro set is a specific, standard-size option worth evaluating.
Quick Verdict
If your equipment needs a nitrile O-ring with 70 durometer hardness, this package gives you 25 rings at USD 20.00. It is a practical buy for maintenance and repair jobs that call for a common O-ring size.
Who It Suits
This set is suited to hydraulic, pneumatic, industrial, automotive, fuel, and oil sealing work. It works well for technicians and DIYers who need a small supply of one O-ring size for bench repairs or spare-parts drawers.
What Stands Out
The set is specified as AS568-235, Buna-N (nitrile rubber), 70 durometer hardness, and new old stock condition. It is described for hydraulic, pneumatic, industrial, automotive, fuel, and oil sealing applications. The nitrile compound is a common choice for oil and fuel resistance, and the 70 durometer hardness offers a balanced firmness for many sealing tasks.
Trade-offs to Weigh
Since this is a single-size pack, confirm the fit before buying. Before purchasing, verify the specifications for your application. Also, because the rings are new old stock, give them a quick visual check before installation.
Product Note
AS568-235 Buna 70 Duro O-Ring Set Qty 25 Hydraulic Industrial Seals NOS

This package is priced at USD 20.00 and is intended for industrial and fluid sealing work. Choose this set when you need a standard O-ring and want a small supply on hand. The one limitation is that the size and material are fixed, so compatibility checks are essential.
Bottom Line
For a maintenance bench or a repair job that needs O-rings, this Buna 70 Duro set is a sensible pick. It gives you one common size in a useful quantity. Check the fit and material against your equipment, and you have a dependable spare-parts option.