When you're shopping for seals, gaskets, and O-rings, a small ring can make the difference between a quick fix and a repeat teardown. The O-ring aisle isn't one-size-fits-all: you can buy a wide metric assortment or a specific standard size in a 25-pack. The choice depends on whether you're stocking a toolbox for many repairs or finishing one known job.
Quick Verdict
At $35.99, the ZDBB 1540-Piece Metric O-Ring Kit is the better buy if you want broad metric coverage plus picks and a storage case. At $20.00, the AS568-235 Buna 70 Duro O-Ring Set is the better buy if you need that specific standard size in a 25-pack.
At a Glance
| Product | Price | What You Get | Best For |
|---|---|---|---|
| ZDBB 1540pc Metric O Ring Kit | USD 35.99 | 1,540 nitrile O-rings in 32 metric sizes, 4 picks, storage case | Multi-job metric maintenance |
| AS568-235 Buna 70 Duro O-Ring Set | USD 20.00 | 25 Buna-N O-rings, 70 durometer, AS568-235 size | Hydraulic and industrial sealing |
Where Each Product Wins
ZDBB wins for coverage. The kit spans a wide range of metric sizes, and the included pick set and storage case make it easy to grab the right ring for pressure washer, air, gas, and general automotive work.
AS568-235 wins for specificity. The set delivers one standard size with a consistent 70 durometer hardness, so you don't have to sort through multiple options when you already know what fits.
Product Notes
ZDBB 1540pc Metric O Ring Kit 32 Sizes Nitrile Rubber Seals with 4 Picks Set
Choose this kit when you want a single box to cover a variety of metric O-ring repairs. You get 1,540 nitrile rubber rings in 32 sizes, plus a 4-piece pick set to help with removal and installation. The organized storage case keeps each size separate, which is handy when you're mid-repair and need to find a seal fast. The trade-off is that the kit is organized around metric sizes, so work that calls for a specific AS568 inch-based size like the 235 won't be directly served by this assortment. If your daily repairs are metric, this is the more versatile foundation.
AS568-235 Buna 70 Duro O-Ring Set Qty 25 Hydraulic Industrial Seals NOS
This set is the right pick when you know exactly which standard size you need. It includes 25 Buna-N (nitrile) O-rings at 70 durometer hardness, a configuration commonly used in hydraulic, pneumatic, automotive, fuel, and oil sealing. There's no assortment to sort through, just a functional count of one specific ring. The limitation is that it covers only one size, so if your repair involves multiple different O-rings, you'll need to buy additional packs. For a dedicated hydraulic seal replacement, this targeted approach minimizes waste and keeps the job moving.
Final Choice by Use Case
If you're stocking a toolbox for ongoing metric maintenance and want tools and storage included, the ZDBB 1540-Piece Metric O-Ring Kit is the practical choice. If you're working on a hydraulic or industrial job that specifically calls for AS568-235 Buna-N seals, the AS568-235 Buna 70 Duro O-Ring Set gives you 25 of the right ring for the specific job.
