Designed for sampling petroleum products in tanks or seawater. Made of brass and stainless steel. Available in 500 cc and 1,000 cc sampling capacity. 1.Mouth Collecting Type Sampler Top lid can be opened at any intermediate level inside tanks and other containers. Sample can be easily collected from any pre-determined depth inside the tank. 2.Bottom Collecting Type Sampler:(Bottom Penetrate Type) Sample can be collected from bottom (Bottom Collecting Type) at any intermediate level of tanks and other containers, or at any pre-determined depth inside the tanks.