0,5 kg of heel lifts from German oldest tannery "Gerberei Martin". Produced in classic oak-bark ground tanning production process. The heel lifts are punched out of the remains from sole production.
The heel lifts comes in two groups of thickness.
Thickness 1: 2 - 3,5 mm (0,5 kg are about 20 lifts)
Thickness 2: 3,5 - 6 mm (0,5 kg are about 12 lifts)
The heel lifts have a size of 90 mm x 100 mm and have all different thickness. 0,5 kg comes out to a batch of 60 mm - 70 mm and is enough for at least 1 pair of shoes.
Read an interesting article about the tannery:
https://shoegazing.com/2021/11/04/report-gerberei-martin-traditional-oak-bark-sole-leather-tannery/
If you have any questions or special needs, please ask. I have a wide range of shoemaker tools.