Wide-mouth openings permit easy loading of biopsy tissues and histological samples Polyethylene screw-cap vials with wide-mouth openings Permit easy loading of biopsy tissues and histological samples Shatterproof, transparent Polyethylene screwcaps have molded-in sealing rings for leakproof seals 05-553-1 7mL vials prefilled with 3.5mL 10% formalin plus one 100-position foam tray 05-553-7 20mL vials prefilled with 10mL 10% formalin plus two 20-position hard plastic processing trays 22-124-971 30mL vials prefilled with 15mL 10% formalin plus two 20-position hard plastic processing trays