21.5mm Super Oyster 316L SS Watch Band for Seiko Tuna, Diver Clasp, Brushed Shipping Estimate : 7 - 10 Business Days within US. Material: 316L Stainless Steel, all solid links include end links Style and Finish: Super Oyster, Brushed Generic 2.5mm diameter Fat stainless steel spring bars included Design to fit: Seiko Tuna 300m models such as SBBN013 You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!