Made with ABS plastic and include a removable NBR rubber knock bar and hush gasket. Holds up to 20+ discarded pucks. 5mm thick, ABS plastic with a "C" gasket shape that's removable. Product Details 6"(w) x 6"(l) x 5"(deep). Cut Measurements: (widest dimensions) 149mm x 149mm. Flange Measurements: 6mm. Designed for in-counter application: Cut Sheet. We recommend having the product in hand before cutting a sinkhole. The knockbox should fit snug within the sinkhole to ensure proper function and durability for the entire unit. Handwash for easy cleanup. BPA free. All units are made of 100% recyclable materials. For more information, visit Recycle Nation.