K&S Engineering 3406 1/16" - 1/4"x12" Rectangle Brass Tubing Assortment 11 Pieces This bundle includes our most used 12" long sizes of Brass Squares & Rectangles. USED IN: DIY Projects (Jewelry, Home Decor, Tinkering, ETC...) Model Making (Trains, Planes, R/C Cars, Etc...) Arts & Crafts Home Improvement Electrical Woodworking Engineering Education Puppetry Stop-Motion Animation INCLUDES: Square: 1/16 3/32 1/8 5/32 3/16 7/32 1/4 Rectangle: 3/32 x 3/16 1/8 x 1/4 5/32 x 5/16 3/16 x 3/8.