Likely Alko 2051 shoes. They're certainly standard Alko shoes. Look on the outer lip of the backplate (round the edge) and there'll be a series of wording and numbers. If there's a number on there, amongst the lettering, like "2051" then that will be your shoes size.
The '20' bit denotes a 200mm drum size and the '51' bit denotes the shoe width, i.e. 51mm.
If you want to identify the cables, there'll be yellow lettering on the black, outer, sheath. Again, within the series of i.d. letters and numbers, there'll be a cable length - something like "1130" or similar. That will be the cable length - 1130mm.
With Alko cables a black sheath means normal, mild steel and a red sheath means stainless steel.