If you are replacing a motor on your pump then this Seal Kit can ensure better performance. Replacing old or damaged o-rings, gaskets and seals can help your pool or spa pump run more effiecently. This is a repair kit for the Sta-Rite Dura-Glas II and Max-E-Glas II pumps. The kit comes with a seal plate O-Ring, diffuser O-Ring, lid O-Ring, and a shaft seal.