13mm West Pharma Flip Off Vial seals are for use on serum vials with a 7mm hole opening
and 20mm outer rim to rim diameter (7x13mm). Highest quality FLIP OFF embossed seals from the
world's most respected manufacturer of vial closures. SHOULD NOT BE USED ON PARENTERALS!
New USP regulations demand that no words or embossed logos are present on the cap. Please order our
West Matte Flip Caps or West Smooth Gloss Caps if you need to comply with USP Chapter 1 regulations