Thank you for viewing! Immediate purchase is welcome! This is an aluminum alloy seat clamp for fixing the seat post. The aluminum alloy body has been hollowed out, making it lightweight at 23g. We have 5 colors available, so please comment with your desired color after purchase. We cannot offer discounts on single items, but if you purchase them together with other products, we will discount them more than the shipping cost, so please request a combined purchase.