About this item Application & Compatibility: primarily used for laboratory gas or liquid chromatography sampling; compatible with most chromatographs on the market; equipped with PP inserts for small-volume sample analysis PH Suitability & Residue Minimization: suitable for solutions with acidic, neutral, or alkaline pH values; PP (polypropylene) inserts minimize sample residue and enhance recovery for trace analysis Sealing & Sample Storage: equipped with premium silicone septa and PTFE/silicone caps for secure sealing and pre-treatment operations such as sample storage Important Notice: always read the enclosed instructions before use; the manufacturer is not liable for damages caused by improper operation Warranty: 1-year coverage period for your peace of mind, if received damaged, please let us know and we will solve it promptly