Light version, supported on mounting feet (to be ordered separately as accessories). Ball bearings on electrically conductive rubber shock absorbers, inside inlet spiders.  Available from the size 7-7 up to the size 18-18.
The mounting feet can be fixed on the scroll sides, with screws, in four alternative positions, to allow installation with orientation 0, 90, 180 or 270, as defined in ISO 13349.
