Code Bass Drum Port Hole Reinforcement Ring – 4" (Black) is a UK-made, high-quality accessory designed to protect and reinforce the mic port hole on your bass drum’s resonant head. Purpose-built by drummers for drummers, Code products combine traditional craftsmanship with modern technology to deliver reliability, durability, and enhanced performance. Plus, all Code products are made from 100% recyclable materials, reflecting their commitment to sustainability. Constructed from compressed UPVC foam board with a strong self-adhesive backing, the Code Port Hole ensures easy application and a clean, professional look. It not only reinforces the cut of your bass drum port but also enhances projection, making it an essential upgrade for both live performance and studio use. Available in multiple sizes and finishes, it’s built to suit every drummer’s setup. Features Protects and reinforces bass drum mic port hole Made from durable compressed UPVC foam board Provides added projection and clarity to bass drum sound Self-adhesive backing for easy and secure application UK-made quality product with professional finish Eco-friendly: made with 100% recyclable materials