When you need a new O-ring, the real question is whether you need to cover many possible repairs or nail one specific seal. That is the difference between the 1050PCS O-Ring Assortment Kit at $9.99 and the AS568-235 Buna 70 Duro O-Ring Set at $20.00. One is a broad metric assortment; the other is a matched batch of one standard size.
Quick Verdict
Choose the 1050PCS assortment when your repair work needs to handle cars, faucets, air lines, gas fittings, and other metric seals in one box. Choose the AS568-235 Buna 70 Duro set when you already know the seal size and want a consistent run for hydraulic, pneumatic, or industrial work.
Comparison at a Glance
| 1050PCS Assortment | AS568-235 Buna Set | |
|---|---|---|
| Price | USD 9.99 | USD 20.00 |
| Pieces | 1050 O-rings | 25 O-rings |
| Sizes | 21 metric sizes | One AS568-235 size |
| Material | Commercial-grade nitrile rubber (NBR) | Buna-N (nitrile rubber), 70 durometer |
| Metric range | 1 mm to 25 mm inner diameter, six thicknesses | Standard AS568-235 dimensions |
| Condition | New | New Old Stock |
| Typical use | Car, faucet, air, gas repairs | Hydraulic, pneumatic, industrial, fuel and oil sealing |
Where the assortment wins
The assortment wins on convenience and variety. It brings many metric sizes together in one case, so you can move from a faucet repair to a car fitting without stopping to order a specific ring. The labeled compartments make the right size easy to find.
Where the AS568-235 set wins
The AS568-235 set wins on specificity. Every ring is the same AS568-235 size, so you can replace the same seal over and over without sorting through a mixed box. The Buna 70 durometer material gives you a consistent choice for hydraulic and industrial sealing jobs.
Product Notes
1050PCS O-Ring Assortment Kit
The $9.99 kit is built around coverage. It contains 1050 O-rings in 21 metric sizes, with inner diameters from 1 mm to 25 mm and thicknesses of 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, and 4 mm. The rings are commercial-grade nitrile rubber with resistance to oil, water, heat, and abrasion, and they operate from -40°F to 248°F. A plastic organizer with labeled compartments keeps everything sorted. If you are doing general repair work on cars, faucets, air fittings, or gas lines, the variety means you can often pull a ring straight from the box. The limitation is that the assortment is metric-based; a job that calls for a specific AS568 dash number or SAE size will not automatically have a matching O-ring in the case.
AS568-235 Buna 70 Duro O-Ring Set
The $20.00 set takes the opposite approach. Instead of variety, you get 25 O-rings in the same AS568-235 size. They are Buna-N (nitrile rubber) with a 70 durometer hardness, which makes them a useful match for hydraulic, pneumatic, industrial, automotive, fuel, and oil sealing jobs. Because every ring is the same size, you can replace the same seal repeatedly without measuring or sorting. The new-old-stock condition offers a known configuration. The trade-off is that this is a single-size batch: once your application calls for a different AS568 number or a non-standard dimension, you will need another set or a separate part.
Final Choice by Use Case
Choose the 1050PCS O-Ring Assortment Kit when you want broad metric coverage for varied repair jobs. Choose the AS568-235 Buna 70 Duro O-Ring Set when you already know the exact seal spec and want matched rings for industrial or hydraulic work.
