Joints of two different diameters are included for each: 3mm and 3.7mm for Normal Hand Unit A; 3mm and 4.4mm for Custom Hand Unit A. Available in November.
Normal Hand Unit A - Also available on Hobby Search.
Custom Hand Unit A - Also available on Hobby Search.
On the other hand, another future release from Kotobukiya is 1/72 Hannibal (PKO Specifications) from Patlabor 2 The Movie. I only watched the TV series of Patlabor, so I'm pretty certain this is a mecha which only appeared in the movie version. Not sure how popular it is, but the price is definitely 'awesome', At 1/72 scale, which is about the height of an average 1/144 Gunpla, 4,410 Yen (inclusive of tax) is quite a high price indeed. ^^;
Available in November.
Also available on Hobby Search.
All images above are from Kotobukiya.