Packed in metal to work on metal, Aluma-Pak, in its extruded aluminum case with solid fill, provides for maximum water resistance. 1-1/2 inch height ensures fit under any neon tube letter application. Combine that with the most advanced SGFI technology available including auto reset bypass, LED display and 36 Inch sleeveless GTO leads, Aluma-Pak is your channel letter solution. Extruded case and solid fill provide maximum water resistance The most advanced SGFI technology available Auto reset bypass and LED display 1.5” height ensures easy t for under neon tube letter applications 90% lighter than equivalent magnetic 36” leads, sleeveless GTO15 UL Listed, CSA Approved 60mA in our AlumaPak Case ensures dependable individual letter mercury tube performance (SS660 OX) The most advanced ground fault circuit protection technology available