As per IS: 383 This apparatus is used to measures resistance of an aggregate to crushing under a gradually applied compressive load.Specification: Consists of M.S.Cylindrical container 150 mm ±0.5mm dia x 130mm to 140mm high with base plate 200 to 230 mm./sqr x 6mm thick. A plinger of 148mm ± 0.5mm dia x 100 to 115mm high. Supplied complete with tamping rod, 16mm dia x 600mm long, one end rounded. And 1 no. Metal measure 115 ± 0.5mm dia x 180 0.5mm high.