Are the beads solid brass

Color: Gray (opaque)

What do the designations "8/0" and "10/0" mean

where the dimensions must be exactly the same

Perlecaps, forgyldt messing, 8x2 mm. 10-100 stk Størrelse:8x2 mm Are the beads solid brassPrecise pearl caps in gold plated brass for jewelry with a professional finish Material: Gilded brass Colour: Gold Size measurement: 8x2 mm Variants: 10 pcs and 100 pcs Pearl caps in gold plated brass, 8x2 mm, are used as a finish around pearls in bracelets, necklaces and earrings. They create a nice and finished expression in your jewelery designs and allow for precise transitions between pearls and other parts. The product is supplied in two pack