Kayalu R25 | Tektite Mark III marker light with marine-grade extras Provides handheld 360&deg; visibility at night and in fog, rain, sleet, snow, conditions of limited visibility Submersible to 1000 feet (300m) below sea level Impact-proof, rugged and durable, constructed of composite polymer and polycarbonate Patented twist-on, twist-off operation Made in the USA