ENHANCED COMPATIBILITY - These shims adapt 2' couplers for secure mounting on 35mm-38mm pipes, broadening your equipment options and ensuring a snug, reliable fit every time. SUPERIOR DURABILITY - Crafted from robust black POM, these shims withstand rigorous use, providing long-lasting support and maintaining equipment stability in demanding environments. INCREASED STABILITY - By precisely filling the gap between the coupler and pipe, these shims minimize wobble and vibration, ensuring stable and secure mounting for lighting and accessories. EASY INSTALLATION - Simply insert the shim between the coupler and pipe for an instant, secure fit, saving valuable time and effort during setup and allowing for quick adjustments.