• GWork Mat Front: 
• Made of cork, Non-slip. 
• For repair and maintenance on your guitar, bass, banjo, mandolin, ukulele, violin, and other string instruments. 
• Work Mat Back: 
• Made of TPE. 
• Textured, anti-slip surface to improve traction. 
• Work Mat Thickness: 
• Thickness: 5mm. 
• Difficult to penetrate.