This sanitary 4-gallon Double Planetary Mixer and Discharge System Model DPM/DS-4S features both interior and exterior type-316 stainless steel surfaces with a 150-grit (#4) finish and electro-polish. Jacketed mixing vessel and special high-viscosity blades help produce thick gels, pastes, putties and other semi-solids under precise temperatures. E-mail sales@mixers.com.