Model complies with California method 216 and is supplied with a 2" round 10 lb hammer and corresponding piston and rod. Required split mold is available upon request. Use with H-4169.4CA Mold. Note: Hammers do not include weights. New-Style Hammers are only threaded in the middle of the shaft. Old-Style Hammers are threaded almost to the end of the shaft. Replacement Hammers, New Style 4" Round Hammer H-4169.2415 6" Pie-Shape Hammer H-4169.2416 Replacement Hammers, Old Style 4" Round Hammer H-4169.415 6" Pie-Shape Hammer H-4169.416