Stackbins Modular Metal Storage Units with Roller-Bearing StackracksStreamline your parts organization with pre built units that pair #6 Stackbins with smooth rolling Stackracks on a durable rack base. These stackable metal storage bins create tidy, accessible compartments for fast picking and restocking, and can be reconfigured or expanded as your needs grow. Built from spot welded steel for heavy duty performance, the roller bearing racks ensure easy, quiet access to stored items. Each unit features same size bins