Stopper Neck Size 13 mm Material Aluminum Product Type Lined Aluminum Seal Color Natural Special Features Flip Cap Seals Provide Tamper Evidence Open Top Seals Expose Stopper for Sample Retrieval with a Syringe Tear-Off Seal Removes Completely Allowing Content to Pour From Bottle Solid Top Seals are Excellent for Long-Term Storage of Sample For Labware Type Bottles Liner Material None Package Quantity 1000