Hiro Seiko 48490 3mm x 4mm Alloy Spacer Set (6 pcs - Black) $4.95 / Tax included. Default Title Default Title Add to Cart Your Email Send This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Hiro Seiko 3mm x 4mm Alloy Spacer Set (6 pcs - Black)