Erva is a USA manufacturer of hardware for the porch, deck, patio and garden. With emphasis on porch and deck applications, Erva produces hangers, and brackets for planters, flower boxes, bird feeders, and decor. Bird feeding related items include porch and deck hangers, baffles, specialty feeders, poles, and our exclusive line of easy to attach "Quick Connect" pole hooks. Erva also manufactures the original line of Nature House brand purple martin houses. We do not sell to big box retailers.