0.25mL Vial Inserts Glass Bevelled Bottom Clear Insert Tube for 9-425 Vials, 11mm Crimp Top Vial and 11mm Snap Top Vial. Material: USP Type 1, 68 Borosilicate Expansion, 1st Hydrolytic, Clear Glass. Dimensions: 31 x 6 mm. Fill vol: 0.3ml ,Usable vol:0.25ml. Content: 100 pcs/pk.