Tyre with a slotted internal section for ridged rims like some issues of the 612, 615, & 617 Military vehicles. Also suits some Britains truck models.
Measurements are 23mm OD: 5mm Wide: Slotted ID 13mm increasing to 14mm or so internally to accomodate the raised hub centre ridge.
Tyre pictures include multiple tyres to show all aspects of the tyres. Price shown is for a single tyre.