Plus Auto Tooling Solution Co Ltd is based in China and lists electrode holders on Global Trade Plaza. Each listing references a table of four product codes (PA-30001 to PA-30004) with corresponding model names U15, U20, U25 and U30, all described as stainless steel holders with a 51 mm by 41 mm footprint and thicknesses of 15.5 mm, 20.5 mm, 25.5 mm and 30.5 mm respectively.