This is a package of 7 x .45mm Aluminum Tubes from K&S Engineering. FEATURES: Ideal for model building and many hobby and craft uses INCLUDES: Two 7 x .45mm Aluminum Tubes SPECS: Length: 11.89" (302mm) Diameter: 0.27" (7mm) Hole Diameter: 0.24" (6mm) jxs 08/29/11 ir/jxs