Instant Leak and Odor Protection: Restore freshness to your RV bathroom with this upgraded flush ball gasket ring that forms a tight water seal and eliminates odors. Ideal for fixing worn rv toilet seals in trailers or motorhomes Precision Fit for 300/310/320 Gravity Toilets: Compatible with Part #385311658, this seal installs into the groove above the flush ball, forming a water-tight and odor-proof barrier between the flush mechanism and the toilet base opening. A reliable fit for RVers performing routine toilet maintenance Nitrile Rubber for Long-Term Durability: Made from premium NBR rubber, this toilet seal ring resists hardening, cracking, and water damage. A reliable replacement part for frequent travelers and full-time RVers Tool-Free 3-Minute Installation: Don’t waste time on complex repairs. Simply remove the old seal, press in the new one (marked side up), and you’re ready to go—no disassembly, no plumber, just peace of mind 2-Pack Travel Smart Value: Keep one in your RV tool kit and another on board for emergencies. A perfect backup for full-time RVers, repair pros, or anyone who’s ever had a surprise leak before hitting the road Reliable RV Toilet Seal Replacement for dometics 300, 310, and 320 Series Toilets This 2-pack RV toilet seal replacement kit is designed for reliable sealing performance and easy do-it-yourself installation. Built from premium NBR rubber, this seal installs into the groove above the flush ball, forming a water-tight and odor-proof barrier between the flush mechanism and the toilet base opening. Compatible with select gravity flush toilets, this toilet seal ring is engineered to replace Part #385311658 and fits most popular camper toilet models. Whether you're fixing a leaking RV toilet, upgrading old dometics toilet parts, or preparing for a road trip, this gasket kit is the trusted solution. With no tools required, installation takes just minutes. The 2-piece replacement seal set provides peace of mind for full-time RVers and weekend travelers alike—ideal for toilet maintenance, seasonal repairs, or emergency backups on the go.