KR24

It's designed to hold 3 quarts of fluid.

Three quarts is the rated capacity on the KR24. It's a round plastic reservoir, so that puts it in a practical size range for small hydraulic power units where you don't need a massive fluid volume but still want enough to keep temps reasonable during operation.

This SPX Stone reservoir holds 3 quarts. Double-check your equipment's requirements to make sure that's the right size.