High-quality silicone rubber
Waterproof (Perfect for outdoor environment)
Strap thickness: 3mm
Stainless steel square buckle

18mm: Buckle Width 18mm. length: 75mm and 115mm
20mm: Buckle Width 20mm. length: 80mm and 120mm
22mm: Buckle Width 22mm. length: 80mm and 125mm

*Free  with purchase of any 3 or more watch straps from our website. 
(Free tool will not be reflected during checkout but will be added into your package during fulfillment)