MATERIAL: Valve cores: copper; Repair tool: Aluminum & Steel. 
SIMPLE TO USE: Compact and simple design item, easy to carry and use. 
PACKAGE INCLUDE: 1 x red and 1 x blue tire stem valve repair tool; 20x valve cores. 
GREAT DESIGN: Designed for use in any car, truck, motorcycle, bicycle, ATV, air-conditioner and more. 
MULTI PURPOSE: Can be used to adjust the tire air mouth. Also applies to the replacement refrigerant valve core leak.