Supplementary Article/Info 2: Aluminium alloy on steel base ; Quantity: 4 ; Quantity Unit: Kit ; for housing diameter [mm]: 51.687 mm ; for wall thickness [mm]: 1.824 mm ; Width [mm]: 18.35 mm ; Supplementary Article/Info 2: with steel back ; Supplementary Article/Info 2: with aluminium alloy layer ; Supplementary Article/Info 2: with aluminium compound layer ; ArticleState: Normal