The brain design was engraved on a thick piece of transparent acrylic in my home studio. Thicker acrylic is a little more durable and less likely to break easily. The key chain is finished with a strong, stainless steel key ring. A great gift for a brain surgeon, nurse, psychiatrist, or anyone who works with the human brain.
Color: Choose your favorite color at checkout Transparent colors will look different depending upon the lighting.
Size: 3 1/4 inch long x 1 1/4 inch wide The length includes the key ring.
