Invincible Marine 1-Inch Brass Twist Drain Plug, Bucket of 48 Made using the highest quality components Performance and quality tested The most trusted name in marine accessories and equipment Twist and snap styles are available in brass and stainless steel Will not jar loose, and forms a vacuum tight seal around the mouth of a drain Made of corrosion resistant brass material Fits 1-inch transom drains Comes with a 1-year warranty