This is a strap extension for the 49mm Ocean Band, made from high-performance elastomer and titanium. It lengthens the Ocean Band by an additional 50 millimeters, perfect for wearing over a wetsuit. The extension includes an adjustable, corrosion-resistant titanium loop to secure the excess strap. This extension must be used with the standard Ocean Band. Compatible with Apple Watch Models 44mm, 45mm, 46mm, and 49mm.