20mm Super Engineer II watch band for SEIKO SBDC001 SBDC003 SBDC031 SBDC033, Dome Deployant Shipping Estimate : 7 - 10 Business Days within US. Material : 316L Stainless Steel, all solid links include end links Buckle type : Dome Shape 316L stainless steel Brushed Lengthened Deployant Clasp Spring Bar : 2.5mm Dia. Fat type spring bars included Design to fit : SEIKO Sumo SBDC001, SBDC003, SBDC005, SBDC031 & SBDC033