Here is the Product Customization Page

• 3D Printed with TPU (Thermoplastic Polyurethane) which is resistant to petroleum products, abrasion and tearing
• Round, square and rectangular with custom hole dimensions.
• Custom sizing creates a snug fit
• Resistant to temperatures up to 150C (300F)
• Very flexible and resistant to tearing and abrasion at room temperature and above
• Does get brittle below 18C (0F) 
• Choice of colors (custom colors not available)