The aluminium finger pieces for several of the Begali keys come in various shapes and colours. You should specify the length, the colour, and whether they should have a cutout on your PayPal submission form when you order them.
In essence there are two lengths, long or short, the colours shown in the picture (white is actually the natural silver of aluminum), and there may or may not be a mass-reducing cutout. The short finger pieces actually come with two different options for the cutout as shown in the picture.