The Model F Valve Puller makes easy work of removing stuck or tight float valves from the sub or drill collar. Simply engage the special catch into the bottom of the float valve, rotate 90°, and then simply slide the bumper into the stop and the float valve is removed. Specifications: DPFV Size: 4R Float Valve Model: F/FA/FC Weight: 12 Manufacturer Description: FV,4R,F/FA/FC,TOP PULLASSY