29131-U. volume 0.3 mL, amber glass vial, Interlocked vial (with fused-in insert), crimp top, 11 mm, pkg of 100 ea. Pricing. Match Criteria: Product Name, Keyword. Certified glass inserts for 12 x 32 mm, large opening vials. Certified glass inserts for 12 x 32 mm, large opening vials. Product Number.