Description: Material: Steel, powder metallurgy material, plastic, rubber Size of case: 28 X 20 X 7cm Capacity:10 X 7.2 X 2.5 inch Small expander: 1-1/8"to 1-3/4"(29-44mm) Medium expander: 2 -1/8" to 2-1/2"(38-64mm) Large expander: 2-1/8" to 3-1/2"(54-89mm) Application ?Use on All Types of Tail Pipes, Mufflers, and Exhaust Systems Package include: 3 x Expander 3 x Pair of rubber ring 1 x Blow mold case