Boat Trix Drain Plug for Boat Bait Well or Storage box. This product is molded with medium durometer rubber and has 4 sealing ring diaphragms. It is a low profile plug with a durable pull ring that is folded flush so that your bait net or other items don't dislodge the plug. It fits most 1-1/2 inch marine drains that are typically used on boats and kayaks. Check your drain dimension. This plug offers excellent sealing properties as compared to others. When other designs have a high profile pull ring, they often times become loose. This design will remain in place with its 4 diaphragms (sealing rings).