MTB triple converter for 8/7/6 wheeliron black converters 42/34 / 24z riveted unchangeablewith black plastic removable coverdesigned for central axis with squareincluding 2 black dustersrecommended axis length: 122.5 mmchain line: 47.5 mmcrank length: 170 mm, material: Fe ironweight: 1370 g, packed in a bag