Water Pump Replacement Parts: there are 2 transfer pump impellers in the package, which can be applied to replace the impeller in the water pump, sufficient to meet your daily uses and replacements Details of Size: this utility pump impeller is approx. 1-3/8 inch diameter, and 1/2 inch width, D shaped, insert to fit 5/16 inch diameter shaft Durable and Reliable: the exterior of the utility pump replacement impeller is made of quality rubber, which is sturdy and durable, not easy to break or deform, serving your long term use Efficiency Improved: this utility water transfer pump impeller is designed to be installed into the inside of the water pump, replace the impeller that cannot work again, prolong the service life of the water pump and improve the work efficiency Compatible Models: this water pump impeller kit fits 1/10 and 1/12 AC and DC motors of many utility pumps, compatible with Trupow Models PAS-30 and PDS-30