50 and 75 Bottle Wine Racks have an Epotherm coating; an epoxy-based coating which is visibly thicker than other coatings on the market, and offers at least 30% more coating protection. Epotherm is both durable and reliable and will not crack, chip, or discolor. The 50 Bottle Rack comes with four connectors to allow two units to be stacked together. The 75 Bottle Rack includes hardware to allow it to be secured safely to the wall to prevent tipping. Each unit is sold separately and comes with a 3 year warranty.This item ships directly from the manufacturer. Product usually arrives in 2-8 business days, depending on destination, including order processing and shipping.