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The HQ 4 bladed props are awesome! These are very light and only weigh in at 1.29 grams. These 40mm 1.6X1.6X4 props are aggressively pitched and a great addition to anyone's 2-3 cell build!
Looking for a larger shaft size? Check out the: 1.5mm Shaft 40mm 1.6X1.6X4 props