IR Inspection window with calcium fluoride crystal stainless steel series reduce hazardous risks during thermal and visual electrical cabinet inspections with IR Windows. Increase inspection efficiency without compromising on safety. Stainless steel durability for harsh or exterior environments. Easy installation and standard punch tool compatible. PIRma-Lock™ locking ring technology with improved stainless steel ring. Hinged flip open cover with integrated thumb screw. Crystal IR window for clear visual and thermal viewing. No dissimilar metal concerns with stainless steel cabinets. Increased corrosion resistance.