Micro Vials found in: Micro Vial Tray, Snap-On Caps for 14 mm O.D. PFA Micro Vials, Micro Sample Vial 2 mL, 4 mL Graduated PFA Micro Vials without Caps, 1.. with vial contents Threaded, screw closures are sterile to 10-6 SAL, RNase/DNase free and leakproof when used with Nalgene Micro Packaging Vials Ordering Information: Micro Packaging Vial Closures are bulk packed without vials, 500 per