I was looking at reviews for my tungsten cubes and found this one (image related is from a larger one):

>The Oculus Quest virtual reality headset is a bit too front-heavy. At 300 g, this cube was exactly the right weight to attach to the back of my Quest to improve its weight distribution, while also taking up the absolute minimum possible amount of space. I used 1-inch wide black electrical tape to attach it, and it was easy and quick. It wasn't exactly the most economical option (you can get a 300 g steel weight for $15), but it's worked really well for me in practice so far.
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>My cube's artificial intelligence system has not yet come online, the required custom battery pack is not included with the solid tungsten cube at purchase. It's a perfectly nice little piece of material, it has a satisfying brushed finish on it with ever so slightly bevelled edges so you don't cut yourself. I play with it during work as a desk toy, but be wary of dropping it as this thing is dense. I put a hole in my Ikea table when the cube dropped to the table from about two feet and landed on a corner.