Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Skutt Peep Hole Plug Sale Login | Register to see price and add to cart | / SKU SK0169 Made of high quality porcelain. The peep holes in the kiln are coated with refractory cement for durability and tapered so you can twist lock the plugs in place. This secure fit prevents them from falling out and breaking . 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Add to Wishlist More payment options This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.