Made With Run-Dry-- Guaranteed to Run-Dry for Up to 15 Minutes 3-3/4" x 3-1/2" Deep, 1" shaft diameter, 12 Pt. Spline Drive, 12 Blades. Impeller only - no gaskets. Replaces Jabsco 17936-0001, 21676-0001, Johnson Pump 09-814B, Volvo 844683, 845796, 875697, 1144066, 842857, Yanmar 165000-35270 Don't get stranded out on the water - order a spare impeller today. Made in USA. Water applications only. Globe impellers are made of Brandonite a high-strength, elastomeric material with self-lubricating compounds for run-dry protection and improved resistance to sand and dirt to help keep you going in the most difficult conditions.