De standard 20mm polyurethane (PU) strap that is made for the SBDX017 (MarineMaster). A very nice and distinctive strap, with a steel keeper as improvement over the SBDX001 strap (which is discontinued).
This is a polyurethane strap, so it is hard and not so flexible. It will get the round shape for your wrist in time, but you can speed up this process by putting it (made round as much as you want it with a piece of string or so) in really hot water.
It is 20mm wide between the lugs, the “shoulders” against the case are 21,6 mm and the strap tapers to 18 mm at the buckle.
|Short end||8 cm|
|Long end||14 cm|
|Push pins||2.5 mm|