OP 700 - Do oil or pomace come into contact with aluminium? Gustav 05 August 2025 07:10 Updated No, absolutely no aluminium is used in the entire OP 700 oil press. The metal components are made of stainless steel. Related articles OP 700 - Oil yield for almonds OP 700 - Is it necessary to grind (brown) linseed before pressing? OP 700 - Quality of the linseed oil produced OP 700 - My device won't turn on. What can I do? OP 700 - Does the oil temperature remain constant below 40 °C?