ASTM C-805 MANUFACTURE : MATEST ( ITALY) SERIES : C 380 FOR RAPID QUALITY CONTROL OF CONCRETE WORKS, WITH BUILT IN POINTER SCALE AND GRAPHT FOR VARIOUS ANGLE. DIMENSION ( LXWXH) = 15X15X40 CM GROSS WEIGHT : 3 KG FUNGSI : UNTUK MEMERIKSA KUALITAS BETON YANG TERPASANG SECARA CEPAT.