1. DoubleTube Sampler Features diameters suitable for various particle sizes, including 19mm for fine powder and rapeseed, 25mm for rapeseed and wheat, 32mm for rice, wheat, corn, and peanuts, and 38mm for larger particles like corn and peanuts. 2. Durable ConstructionMade of quality stainless steel, this sampler is rustproof, waterproof, and moistureresistant, ensuring a longlasting and reliable tool for your sampling needs. 3. UserFriendly OperationSimply rotate the handle to close the sampling hole, insert it to the desired depth, then turn 90 degrees to open the hole for sampling. Once finished, close the hole and withdraw the sampler effortlessly. 4. Enhanced Sampling CapabilityThe widened and evenly distributed sampling port allows for collecting materials from various depths. The secondary reinforced welding joint provides a strong bond, ensuring durability and ease of use.