Quick Take
Choosing the right seal, gasket, or o-ring is more than picking a round piece of rubber. You have to match the material to the fluid, the size to the groove, and the quantity to the job. The four listings here show how different those choices can be, with prices spanning more than $30 across the group.
Need a targeted pair for an air-rifle piercing cap or valve? That set is the specific pick. Rebuilding a blender jar? The replacement gaskets cover domestic and commercial models. Want an industrial single-size o-ring set? The industrial set is ready for hydraulic and pneumatic work. Prefer one box for many metric repairs? The assortment kit includes picks and a case.
Listed Price Comparison
| Product | Listed Price | Price Bar |
|---|---|---|
| QB78, QB78D, XS78, TH78 Piercing Cap & Valve TWO (2) O-Ring Seals URETHANE | USD 5.75 | |
| Hamilton Beach 2 Pack Blender Replacement Rubber Plastic Gasket Ring Seals | USD 6.99 | |
| AS568-235 Buna 70 Duro O-Ring Set Qty 25 Hydraulic Industrial Seals NOS | USD 20.00 | |
| ZDBB 1540pc Metric O Ring Kit 32 Sizes Nitrile Rubber Seals with 4 Picks Set | USD 35.99 |
The lowest listed price is $5.75 for the two-piece urethane set, and the highest is $35.99 for the 1,540-piece metric assortment.
Decision Matrix
- Air-rifle piercing cap or valve: targeted o-ring pair - application-specific.
- Blender jar gasket: gasket ring set - for domestic and commercial blender models.
- Industrial single-size o-ring: industrial set - for hydraulic, pneumatic, automotive, fuel, and oil sealing.
- Metric assortment: multi-size kit - includes picks and a storage case.
Product Notes
QB78, QB78D, XS78, TH78 Piercing Cap & Valve TWO (2) O-Ring Seals URETHANE
At $5.75, this is the lowest listed price in the group and the most application-specific option. The two urethane o-rings are identified as #3401 and #0409 and are factory-installed parts for the piercing cap or valve on QB78, QB78 Deluxe, XS78, and TH78 models. Urethane offers strength, tear, and abrasion resistance. The limitation is scope: you get exactly two o-rings for one position, not a multi-size assortment. If your project is a QB78-series piercing cap or valve, this set is the direct match.
Hamilton Beach 2 Pack Blender Replacement Rubber Plastic Gasket Ring Seals
This $6.99 two-pack is a convenient fix for a blender jar leak. The gasket ring sits between the cutter and jar and fits all Hamilton Beach domestic models as well as commercial models such as 908 and 909. The Felji replacement part includes two gaskets, with dimensions of 1.875 inches inside diameter and 2.68 inches outside diameter. The limitation is that these are blender gaskets, not a general-purpose o-ring assortment, so they are not meant to cover hydraulic or pneumatic sealing. For a Hamilton Beach jar rebuild, this set gives you a spare.
AS568-235 Buna 70 Duro O-Ring Set Qty 25 Hydraulic Industrial Seals NOS
This $20.00 set provides 25 o-rings in a single AS568-235 size, made from Buna-N (nitrile) rubber at 70 durometer. Common applications include hydraulic, pneumatic, industrial, automotive, fuel, and oil sealing. It is labeled New Old Stock. The limitation is the lack of variety: every ring shares the same AS568-235 specification, so it covers only that particular size. If you know that size fits your equipment, the 25-count quantity gives you spares for multiple jobs.
ZDBB 1540pc Metric O Ring Kit 32 Sizes Nitrile Rubber Seals with 4 Picks Set
At $35.99, this is the highest listed price in the group and also the broadest. The kit contains 1,540 nitrile rubber o-rings in 32 metric sizes, with resistance to oil, fuel, water, and wear. It also includes a four-piece pick and hook tool set plus an organized storage case, making it ready for automotive, plumbing, pressure washer, air, gas, hydraulic, and general maintenance tasks. The trade-off is that this is a metric-only assortment, and it is much larger than a single-target repair pack, so you will be storing many rings you may not need immediately.
Final Recommendation by Use Case
If you know the exact part you are replacing, a targeted kit is the cleanest path. For an air-rifle piercing cap or valve, choose the air-rifle o-ring pair. For a blender jar leak, choose the jar gasket set. If you need a single industrial size for hydraulic, pneumatic, automotive, fuel, or oil sealing, the industrial set is the match. If you want one box for many metric jobs, the metric assortment kit with picks and a case is the comprehensive option.
