This package carries (a)-(e). (a) 6 Pieces of 4 / 100MM Diameter DRY use Pad for granite marble concrete travertine they can be wet or dry use. Dry use make its life longer. 2 Pieces of STEP 1, STEP 2, STEP 3. (b) 6 Pieces of 4 / 100MM Diameter wet use Pad for granite marble concrete travertine they can be wet or dry use. Wet use make its life longer. (c) 6 Pieces of 5 / 125MM Diameter DRY use Pad for granite marble concrete travertine they can be wet or dry use. (d) 6 Pieces of 5 / 125MM Diameter wet use Pad for granite marble concrete travertine they can be wet or dry use. (e) 1 Piece of 4″ and 1 Piece of 5″ aluminum pad holder (its arbor is 5/8-11 Female Thread). Recommend 2800 – 5000 rpm (grinder or polisher speed must be lower than 5000 RPM).