This self parking Light Duty wiper is suitable for either bulkhead or through glass mounting. The 215BD is a pendu-lum or single spindle unit. It can easily be converted to a pantograph system with the external pantograph plate that comes with the pantograph wiper arm. The wiper motor unit is fully enclosed in a waterproof housing. The housing is rated at IP66, so the 215BD is suitable for both open and covered boats.