LLG-Crimping Tools ND8/ND11/ND13/ND20. LLG-Headspace Seals ND20 (Pressure Release Caps), Aluminium, ready assembled. LLG-Headspace-Precision Thread Vials ND18. LLG-Headspace-Vials ND20 (20ml and 50 ml) LLG-Headspace-Vials ND20 (5ml and 10ml) LLG-Magnetic Universal Screw Seals ND18 for Precision Thread Vials ND18.