This is a set of optional parts for modifying or detailing robot and other science-fiction kits.
From Kotobukiya's website:
The next in this series is BOTTOMS SET! This set is a reconstructed lower body that was designed by Masaki Apsy, to which users can rebuild and modernize already existing Megami Device models. Colors come in White, Skin Color A, and Skin Color B.
- The thighs have been made bigger for more stability in the legs.
- A new feature has been built in where the hip joint can be expanded sideways for more flexibility in creating various dynamic action poses.
- The line between the hips and the thighs have been adjusted. Can also be attached to already existing hip parts of Megami Device models.
- The balance has been adjusted to focus more on style rather than stability.
- Bare ankles are also included.
- Newly sculpted hip parts and thigh parts are included.
- Newly sculpted compact-sized ankles are included.
- Skin Color A is compatible with WISM ASSAULT, the ASRA series, the Chaos&Pretty series, and SOL Raptor.
- Skin Color B is compatible with the BULLET KNIGHTS series (excluding HELL BLAZE).