Liquid Petroleum Products Manual Ball Check Sampling Bottles for OEM. Customized Volume: Available in 330ml, 500ml, and 1000ml capacities to meet specific needs. Dual Material Options: Choose between 304 Stainless Steel for corrosion resistance or Brass for anti-spark safety. No Welding Construction: Uses stamping and stretching technology to prevent oil leakage common in welded samplers. Quick-Acting Valve: Bottom valve opens and closes easily for efficient sample collection and sealing. Wide Mouth Design: Facilitates easy filling, cap replacement, and cleaning of the sampler. Multi-Level Sampling: Capable of collecting samples from bottom, middle, top, surface, and composite levels. Anti-Static Safety: Requires connection to ground via anti-static rope to eliminate static electricity risks. International Compliance: Conforms to GB/T 4756, GB/T 6680, ASTM D4057, and ISO 3170 standards.