With Write -on spot and graduations at 0.5,1.0 and 1.5mL 9-425 Screw-thread vials are dimensionally equivalent to 11mm crimp top vials. Therefore, they can be used in any autosampler that are designed for 11mm crimp top vials. 9-425 Screw-thread vials give excellent sealing as well as the ease of applying and removing by hand.