Hth does a Cumana set of dual 5.25" half-height drives weigh 5.8kg?
It's got two separate (small) transformers for some reason; did NEC make the drives out of depleted uranium?

#retrocomputing

@penguin42 I think there are some good reasons for the transformers, a single one with a higher power rating would likely not fit in the box, also buying more of the same item is often cheaper. I had a few of these but they succubed to my "I didn't know the roof was leaking" storage strategy.