Single Drum Rotary Rock Tumbler Stone Metal Glass Polisher 3 lb Capacity Get a Smooth, Polished Finish on Rocks, Semi-Precious Stones, Glass even Metals Quiet Low Speed Tumbler is Designed to run for days at a time, to ensure a smooth lustrous finish Quiet Rubber Barrel Operation 120 Volt Durable Metal Design Fan Cooled Motor [Please see my other listings for the Abrasive Grit to use with the polisher] ---------- Note: Some Types of Rocks to Avoid A few types of igneous and metamorphic rocks are not good choices for the rock tumbler. These include: Schist, gneiss and other rocks that contain significant amounts of mica (micaceous rocks often split apart, shedding grains that spoil a polish) Rocks that are made up of easily dislodged grains (these dislodged grains will get into the polishing step and cause lots of scratches) Rocks such as scoria, pumice or vesicular basalt that contain open pore spaces (grit gets trapped in the pores and falls out during the next tumbling step, causing scratches on the rocks) Tuff and other poorly lithified rocks (as described above, these shed grains that spoil a polish) ---------- USA SELLER Not a Drop Shipper, We Stock 100% of our Inventory Onsite Fast Same Day, or Next Business Day Handling ( no waiting 2 months for your items from China ) We strive to provide excellent service and on time deliveries, with either same day, or next business day Handling on all of our items.