KS-D630
XTR BR-M965/966/975,
Deore BR-M765/775/655/
665/585/535/595/596/M800/
M975/T665, Alfine BR-S500
/501/R505, Hone BR-M601, comp. w. Tektro TRP Dash Carbon

KS-D630A
With aluminium backing plate and organic front, suitable for the same range as D630

KS-D630E
With ceramic back and organic front, suitable for the same range as D630

KS-D630K
With forged aluminium back with cooling pins and high performance organic compound. Suitable for the same range as D630 EXCEPT:
DEORE BR-M596/M595
ALFINE BR-S501/S500

KS-D630S
With copper plated backing plate and sintered front for extreme conditions like down hill, suitable for the same range as D630

Occasionally, without notice, manufacturers change product design and/or specifications.