1. Product Description. SILVER 11mm Open Top Crimp Cap with Transparent TEF/Natural Rubber red-orange Septa 1mm Thick. 100pcs/pk. 5. OEM&ODM Service. *Aijiren has a manufacturing plant covering 10,000 square meters area. *5,000 square meters 100,000 grade cleaning rooms,cleanliness of Aijiren products.