These are .060 Fiber Optic Strands from Plastruct. FEATURES: Clear fiber optics lighting. The fiber is easily trimmed, and can be expanded with heat. Each strand is made of acrylic and styrene. Versatile and easy to use; instructions included. INCLUDES: (1) Strand REQUIRES: Light Source SPECS: Diameter: .060" (1.5mm) Length: 12" (3.7m)PlastructPart PLS92505