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The Goldline propeller is the most widely used propeller type in both recreational boating and small commercial vessels thanks to its high efficiency and excellent maneuverability. The GL propellers shown here feature a standard shaft hole. Non-standard shaft holes are also available (prices upon request). The GL 235, 352, 485, and GL 592 are available from stock in the most common sizes. In most cases, manganese bronze (MnBr) is perfectly suitable as propeller material. However, for aluminum vessels, it is necessary to use a propeller made of nickel-aluminum bronze (NiAlBr). Mn.Br. contains up to 40% zinc, which often causes galvanic problems with aluminum. NiAlBr is nearly zinc-free, making it safe to use in all cases. We also recommend using NiAlBr propellers in cases of extreme cavitation or heavy loads. The prices listed are for Mn.Br. propellers. All propellers are also available in NiAlBr for an additional charge. If you are unsure about your choice of material, please contact our Propulsion Sales department. Blade area D.A.R. GL235-2B : 35% D.A.R. GL352-3B : 52% D.A.R. GL469-4B : 69% D.A.R. GL485-4B : 85% D.A.R. GL592-5B : 92%