Diameter: 120 mm (4.75in.) Overall length: 60 cm (24in.) Designed for concrete, cement, mortars, and grouts with aggregate less than 3/8in. diameter. Also for gypsum lime plaster, fibrated aluminum roof coatings and paints. Not for highly viscous materials. Material Flow: Top to Bottom Connection: 13 mm or 1/2in. Hex Shank, for BNR6402K mixer. Paddles sold in pairs left & right