CAP OPHWIS-010 Weight Plates
- Plate
- 4
- Cast Iron
- 10 lb, Set of 4,Black
- More reviewed than 99%
A matched set of four 10 lb cast iron plates for standard barbell work, sold as a black 40 lb package.
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How it ranks among the 114 plates we track
4.7★ across 15,711 Amazon ratings, Bayesian-smoothed toward the category average.
15,711 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
1,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 114 plates we track - how the scorecard works · full plates data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The CAP OPHWIS-010 is a set of four 10 lb cast iron plates, 40 pounds total, finished in black for standard barbell loading.
Cast iron is the traditional plate material, valued for its density and low cost compared to bumper or rubber-coated plates, though it is noisier when set down and can chip paint on a barbell over time. Four 10 lb plates gives two per side of a standard bar.
- Four 10 lb plates
- 40 lbs total
- Cast iron construction
- Black finish
Who it's for
Fits a lifter building out a plate collection at home who needs matched pairs for balanced loading. Less suited to anyone needing bumper plates for drops from height, since cast iron is not built to be dropped.
Strengths and trade-offs
Drawn from this product's published specifications.
- Set of four gives two matched pairs
- Cast iron holds weight precisely
- Standard sizing fits most barbells
- Not rated for dropping like bumper plates
- Bare cast iron is louder and can chip
Performance notes
Cast iron plates hold their weight rating precisely and stack tightly on a bar, the tradeoff being that dropping them on a hard floor can crack the plate or damage flooring, unlike rubber bumper plates built for that use.
Specifications
| Brand | CAP |
|---|---|
| Model | OPHWIS-010 |
| Pieces | 4 |
| Material | Cast Iron |
| Color | 10 lb, Set of 4,Black |
| Item Weight | 40 pounds |
Other CAP plates
How it compares
This product against the closest alternatives we track in plates.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| CAP OPHWIS-010 Weight PlatesThis product | 4.7 / 5 | 15,711 | 4.6 / 5 |
| RitFit Weight Plates for BarbellRITFIT | 4.8 / 5 | 1,565 | 4.4 / 5 |
| EVERYMATE 1.25LB Change Plates Set Weight PlatesEVERYMATE | 4.8 / 5 | 1,448 | 4.4 / 5 |
| JFIT 20-6650-pr Weight PlatesJFIT | 4.7 / 5 | 777 | 4.3 / 5 |
| Yes4All R61J Weight PlatesYES4ALL | 4.8 / 5 | 605 | 4.3 / 5 |
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Questions about the CAP OPHWIS-010
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How many plates come in the CAP OPHWIS-010 set?
It includes four plates at 10 lb each, for 40 lb total.
What material are the OPHWIS-010 plates made from?
They are cast iron.
Are the CAP OPHWIS-010 plates safe to drop?
Cast iron plates are not designed for dropping the way rubber bumper plates are.