Features 1. Crimp caps provide a consistently secure seal 2. Beveled top for maximum secure seal 3. Choice of a pressure safety release cap at 45 psi 4. 10/20mL Clear /Amber Precision Crimp Headspace Vial,Flat/Round Bottom, 22.5*46mm 5. PTFE/Silicone Septa Φ20*3mm Temperature Resistant -60℃-200℃ with 9mm thread 6.