Raimondi "Iperbet" Job Site Power Mixer for mixing tile thin-sets and grouts. Mixing capacity 50 lbs – 100 lbs. The Bucket rotates at 55 to 60 RPMs. Mixing at low RPMs does not entrap air that will cause tile bonding problems. Gear Ratio = 25 to 1 Fixed paddle, rotating bucket system provides a higher level of operator safety and allows the operator to check the mix quality while mixing. Iperbet Job Site Power Mixer supplied with two buckets 12 gals, standard mixing blade, hex key, user and maintenance manual.