Many clamps flatten records successfully but have very mixed results on sound quality. Generally, your average heavy weight will pump up the bass but dull down the upper mid-band and majorly limit top end openness. There is a perceived softening of dynamics (even in the bass), a slowing down of the sound and the decay of notes suffers.

For 25 years or so weve tested turntable record weight designs (both ours and 3rd parties) and never came across a weight or clamp which enhanced sound quality without detriment to crucial aspects of the performance. Then one year we were sharing a room at the Indulgence show with the importer of the Shun Mook record weight. To my astonishment, this actually worked and enhanced everything in the music with no downside. The only problem was that it cost £2000.

This experience got us thinking and after some interesting design experiences with previously untested materials we thought it worth trying again. This produced the Gravity One.

Building on the success of the Gravity One, we kept experimenting with the design of our record weight. This produced the Gravity Two.

Specifications

Dimensions: 70mm diameter x 40mm height.
Weight: 67 grams.

Perfectly fits spindles between 5mm to 40mm in height (where height is measured between the top of the record and the very top of the spindle).
If your spindle is lower than 5mm the weight will work fine but not make contact with the spindle. This means its centrality will depend on your positioning it by eye. Centrality makes no difference to performance but can sometimes not look as nice due to the off-centre movement as the platter rotates.