Bel-art polypropylene trigger sprayers with 53mm adapter 116200050, 2/pk trigger sprayers with adapters fit any scienceware bottle with an easy to fill, 53mm wide closure and offer convenient, adjustable spray dispensing of a wide range of chemicals including bleach, ethanol, machine oil and water. features: simple to install sprayer is perfect for ghs labeled safety-vented wash bottles (series 12416 and 12432), as well as osha compliant 16oz and 32oz scienceware non-vented, wide-mouth wash bottles (series 11716 and 11732) stainless steel, spring-action pump in the trigger sprayer will not corrode with repeated exposure to 10% bleach disinfecting solution made from durable, chemical resistant polypropylene adapter plus trigger sprayer adds approx. 5-1/2″ height to a wash bottle sprayer without adapter fits most bottles with a 28mm opening bottle not included note: sold in inner pack quantity includes 2 trigger sprayers, priced per each pack.