Shimadzu Scientific US Webstore - Vial Storage Rack. Vial Storage Rack Designed for 6, 0, or 20ml Headspace Vials, 36 Capacity, 5pk Vial Rack for Headspace Vials • Securely holds up to 36 headspace vials (fits 6, 0, or 20 mL vials). • Vials lock in rack for convenient one-handed cap removal.