metal button badge material:tin size:2.5,3,4,4 ... full color printing design high quality,with different pin back metal button badge,pin badge1. material:tin/plastic2. size:20mm, 25mm ... , 30mm, 35mm, 40mm, 45mm, 50mm, 70mm,140mm3. full color printing design4. with different pin ... quantity acceptable, high quality, fast delivery metal button badge