The Exalto PU arms are suitable for all MD wiper systems for small and medium sized windows up to 1100 mm in height. This means that they can be installed on all MD1 & MD2-series wiper motors. All PU arms have a fold back feature, so they can be placed in fixed position away from the windshield. This makes it easier to mount the arms, replace the blades or to clean the window. As a standard the PU arms also have adjustable spring pressure to regulate the pressure of the blade on the window steplessly. The .01 version allows double spring pressure on high-speed vessels or raked windows. The position of the blade in relation to the window configuration can be adjusted by the swivelling blade clip. All Exalto wiper arms are made of stainless steel 316 and have bronze heads. A black coating is applied on all metal parts as a standard to prevent reflection. The polished arms are new, so you can choose which arm suits the look of your vessel most. The wiper arms are adjustable in length.