1) Aluminium body &cover,polished surface pressure cooker 2)Quick and heat transmission 3) Size:3L--20L 4)Multi-safety device Descriptions:1 ... ) Aluminum alloy stronger body and cover,polished body surface.2) Polished ... even heat transmission6) Pressure cooker, 3L,4L,5L,7L,9L,11L,13L ,15L ,18L,20L for you to choose. SizeQty Meas. CBM40 ...