Steel Weld Cup for Wrought Iron Patio Chairs. This steel cup can be welded to the bottom of older wrought iron patio chairs and tables. The 1 1/2" Wrought Iron Round Cup Glides (Part Number 30-614) fit inside of these steel weld cups. Patio Furniture Parts are our specialty. Our outdoor patio furniture parts are designed to work for most manufacturers of outdoor patio furniture. See the other sections of our website for additional patio furniture repair parts and supplies.