BW16041 3.81 x 1.875 x 1/4 CCW single inlet metal blower wheel.
Single-inlet metal blower wheel. Measures 3-13/16" diameter x 1-7/8" deep. Round 1/4" round bore with set screw. Maximum RPM 5000. Turns counter-clockwise when viewing from the shaft (inlet) end (CCWSE). 130-1-6041