40% larger opening than standard narrow opening vials Provide graduated write-on marking area, measures 0.5, 1.0 and 1.5ml X945+UE9491 X927 or X923+UE9191 Description Cat No 1.5ml clear screw vial, 9mm thread X917 1.5ml clear screw vial w/graduated marking spot, 9mm thread X927 1.5ml clear screw vial, 9mm thread, USP type 1 X913