Perko - Round Strainer - Bronze - 3-1/2" - MADE IN THE USA - 0086DP3PLB Cast bronze Drilled holes Technical Information: For Thru-Hull Size - 1" Outside Diameter - 3-1/2" Inside Diameter - 2-3/8" Model Number - 0086DP3PLB Screw Size - #8 Ship Weight - 1.7/1.7 lbs. MADE IN THE USA