Catalog (PDF-4Pg) Flush-mounted control units and pilot lights for 22.5mm mounting diameter. They are flat enough (1.4mm) and are a good alternative for membrane keyboards. Front bezels are flat and rounded square shape. 22mm mount with rounded square shaped bezel. Suitable Contact Blocks {article 60}{text}{/article} {article 61}{text}{/article} {article 62}{text}{/article}