The product is 316 L steel. The wristband has an adjustable length between 18-22 cm. Does not fade and darken. Not affected by pool and sea water. Shipping Information For UK Orders: Your orders are prepared within 1-2 business days and shipped via Royal Mail’s 48-hour tracked service. You can track your shipment through your account. For International Orders: Your orders are prepared within 1-2 business days and shipped via Evri’s tracked service, with an estimated delivery time of 5-7 business days. However, depending on the destination, delivery can take 1-3 weeks. You can track your shipment through your account. Important Note * Delivery delays are usually caused by the shipping carrier and are beyond our control.