Daisy Chain Dummy Components and Practice Kits. Lead-Free and Tin-Lead dummy components. PC Boards for Machine Run & Solder Practice. BGA, CSP, WLP Wafer Level BGA and fine pitch. eWLP embedded daisy chain die for build up PCB. Open cavity (air-cavity) QFN for mounting live die. QFP Lead Straightener tool. Daisy Chain BGA with 0.3mm and 0.4mm pitch. CCGA pins available.