Considerations: Selecting different backpieces will not provide notable differences to the acoustic properties or typing feel of the keyboard. Backpieces in brass, and copper will increase the weight of the board.

Black: Anodized Aluminum
Blue-Grey: Anodized Aluminum
Maroon - Anodized Aluminum
Blue: Anodized Aluminum
Lilac: Anodized Aluminum
White: Electrophoresis-coated Aluminum
Brass: Sandblasted and clear coated brass
Copper: Sandblasted and clear coated copper
Black Mirror: Polished PVD coated brass
Gold Mirror: Polished PVD coated brass
Silver Mirror: Polished electroplated brass
Multicolor Titanium: PVD coated titanium