Features: 16mm is the ultra-thin series. 17mm and 19mm are the original series. 20mm is the multi-functional jelly series, suitable for SUSB401, SUSB402, SUSB101, etc. Made of high-quality silicone material, making you feel light, sturdy, soft and flexible during use. Waterproof and sweatproof, comfortable to wear. Easy to install and change straps, help you install DIY quickly in a short time. Multiple colors to choose from, stylish and bright, fit your personality. Watch band only, other accessories demo in the picture is not included! Specification: Material: Silicone Type: Watch Band Version: 20mm(0.79in), 19mm(0.75in), 17mm(0.67in), 16mm(0.63in) Color: Brown, Dark Blue, Navy Blue, Black, Red, Yellow, White Size: One Size Band Length (excluding buckle): 11.8+8.0cm(4.65+3.15in), 12.1+8.5cm(4.76+3.35in), 11.0+8.0cm(4.33+3.15in) Buckle Width: 20mm(0.79in), 19mm(0.75in), 17mm(0.67in), 16mm(0.63in) Quantity: 1 Pc