Outdoor Starter kit+This is a complete set to get you started with tube light painting! You'll find in this one my three main tubes, three additional colors to get more creative options and a couple of accessories. Use the feathers to add a touch of color at the top of the tube. We teach how to use these tubes on this Youtube channel and in my private learning group. Specifications: Tubes length: 44" (112cm) Inner diameter: 1. 125" (28mm) Super light weight polycarbonate