Blenders. Features Maximum speed: 15000RPM on variable knob & 18000RPM on pulse, New silent and durable coupling system for intensive and long life, Waterproof removable seal on container cover, Completely safe patented locking system for jug and cover when operating, 4lt stainless steel jug with removable insert (4.6cm opening) for easy add of product mid blend, Polycarbonate jugs available on request (BPA Free), Specsheet