The Bonetto Cinturini Ref. 306 Black Classic Rubber Strap are Made In Italy using natural rubber. What this means is that they are strong, supple and water resistant.
And because they are using natural rubber means they are not attracted to dust and particles (read: not lint magnet) as compared to lower quality silicon straps found outside.
The Ref. 306 Black Classic Rubber Strap is a classic style rubber strap which is 5mm thick and tapers to 4mm at the ends. This means that this strap is suitable for most watches if you want a clean no nonsense looks.
Made in Italy
Material: Genuine Italian Rubber
Available in Black, Midnight Blue, Orange.
Buckle width: 18mm
Length: 80/120mm excluding buckle
Length to smallest hole: 55mm
Thickness: 5mm tapering to 4mm