InSinkErator 3-1/2 in. Black Plastic Sink Stopper is a durable and effective solution designed to fit most garbage disposals. Crafted from long-lasting black plastic, this sink stopper features an inside diameter of 3-3/8 inches and an outside diameter of 4-1/2 inches, ensuring a secure fit for your disposal needs. Its sturdy construction provides reliable performance, making it an essential accessory for your kitchen sink. Model Number: STP-PL