An O-ring leak is a simple fix once you have the right metric ring on hand. The harder part is choosing an assortment that covers the sizes you are likely to need. Piece count, size range, and price all change that decision. The four kits below are metric, use nitrile rubber, and suit general repair work, but they are not equal in price or scope.
Quick Take
These four metric O-ring kits span roughly $27 from low to high. The compact kit sits in the middle of the price range, while the ZDBB kit is the largest. If you need common sizes for everyday repairs, one of the higher-count kits is a straightforward starting point.
Listed Price Comparison
Here is the same lineup with its listed price and kit contents:
| Kit | Contents | Listed Price | Price Bar |
|---|---|---|---|
| O-Ring Assortment Kit 400Pc Nitrile Rubber Metric Sizes Industrial Seals | 400 pieces, metric sizes 4mm to 30mm O.D. | $12.74 | |
| 1050PCS O-Ring Assortment Kit | 21 Metric Sizes for Car Repair, Faucet, Air, Gas | 1,050 pieces, metric inner diameters 1mm to 25mm | $9.99 | |
| ZDBB 1540pc Metric O Ring Kit 32 Sizes Nitrile Rubber Seals with 4 Picks Set | 1,540 pieces, 32 metric sizes, 4 picks | $35.99 | |
| O Ring Kit 1050 PCS O Ring Assortment Kit 21 Size Metric Nitrile Rubber | 1,050 pieces, metric inner diameters 1mm to 25mm | $8.86 |
Decision Matrix
- ZDBB 1540pc Metric O Ring Kit 32 Sizes Nitrile Rubber Seals with 4 Picks Set - for widest metric coverage in one box.
- 1050PCS O-Ring Assortment Kit | 21 Metric Sizes for Car Repair, Faucet, Air, Gas - for a large everyday supply with labeled compartments.
- O Ring Kit 1050 PCS O Ring Assortment Kit 21 Size Metric Nitrile Rubber - for a straightforward metric O-ring supply.
- O-Ring Assortment Kit 400Pc Nitrile Rubber Metric Sizes Industrial Seals - for a compact, labeled, resealable stash.
Product Notes
O-Ring Assortment Kit 400Pc Nitrile Rubber Metric Sizes Industrial Seals
The smallest kit in this group is still useful because it covers metric outside diameters from 4mm to 30mm with five thickness options, all in a labeled, resealable container. The nitrile rubber suits plumbing, automotive, and general repair work. The trade-off is total capacity: at 400 pieces, it holds far fewer rings than the other kits, and its $12.74 price is above two of the larger-count options. If you want a compact backup, this keeps the basics within reach.
1050PCS O-Ring Assortment Kit | 21 Metric Sizes for Car Repair, Faucet, Air, Gas
This kit takes the standard 1050-piece approach and makes it easy to use: 21 metric sizes with inner diameters from 1mm to 25mm, plus a compartment organizer with clearly labeled sizes. The nitrile rubber is designed for car repair, faucet, air, and gas applications, and the set is priced near the low end of this comparison. The limitation is the 21-size range; if you work on specialized equipment, you may need to fill gaps beyond the common sizes. For a house-and-garage mix, this kit is a balanced choice.
ZDBB 1540pc Metric O Ring Kit 32 Sizes Nitrile Rubber Seals with 4 Picks Set
If you want one box to cover a lot of ground, this is the largest of the four kits. It includes 1,540 rings across 32 metric sizes and adds a four-piece pick-and-hook set. The application list includes automotive, plumbing, pressure washer, air, gas, hydraulic, and general maintenance. The nitrile rubber resists oil, fuel, water, and wear. The limitation is the price: $35.99 is the highest here, and if you only need a handful of common sizes, the extra rings and tools may remain unused. For frequent repair work, the size spread is what you are paying for.
O Ring Kit 1050 PCS O Ring Assortment Kit 21 Size Metric Nitrile Rubber
This kit is the lowest-priced option in the lineup, and it still provides a practical spread of common metric sizes. The black nitrile rubber suits general seal work, and the count is high enough to keep spares on hand. The trade-off is the size range, which is less extensive than the ZDBB kit; if your projects cover a wider variety of equipment, you will likely add more sizes later. For a simple, low-cost starting point, this kit is hard to overlook.
Final Recommendation by Use Case
For the broadest coverage, choose the ZDBB 1540pc Metric O Ring Kit 32 Sizes Nitrile Rubber Seals with 4 Picks Set. It covers the most metric sizes, so you will need fewer separate seal purchases.
For an everyday kit that balances size, organization, and cost, choose the 1050PCS O-Ring Assortment Kit | 21 Metric Sizes for Car Repair, Faucet, Air, Gas.
For the lowest listed price, choose the O Ring Kit 1050 PCS O Ring Assortment Kit 21 Size Metric Nitrile Rubber. You still get a large supply of common sizes without spending more than necessary.
For a compact backup, choose the O-Ring Assortment Kit 400Pc Nitrile Rubber Metric Sizes Industrial Seals. Its smaller size is easier to store.
