Handmade from fine silver and sterling. The crank arms are fine silver and the chainring is sterling, which should have this piece aging beautifully. The chain is a 1.5mm 20" sterling flat chain (made in italy). The piece in these images has been sold. I will be making you another one upon your order. Due to the handmade nature of this product it will look very similar but not be an exact copy. 3-5 business days may be needed to fulfill this order.