|in CHF thousand at 31 December||2017||2016|
|Raw materials, auxiliary materials and supplies||15,262||16,550|
|Semi-finished and finished products||15,914||14,246|
|Total inventories gross||46,189||47,508|
|./. allowance on inventories||–13,939||–9,955|
|Total inventories net||32,250||37,553|
The allowance on inventories includes additional write-downs amounting to CHF 4,122,000 relating to the Industrial Systems segment. See also note 4.2.