Nalgene&trade, Top Works&trade, Platinum-cured Silicone, Polypropylene,

Nalgene™ Top Works™ Platinum-cured Silicone, Polypropylene, Closure, 53B, 2 portFor Use With: Nalgene Rapid-Flow filter bottles with 45 mm necksCertifications/Compliance: Meets requirements of USP Class VI current editionClosure Size: 53 BDescription: 2 ports - 2 x 1/4 in. (6.35mm)Material: Platinum-cured SiliconeType: ClosureFor Use With (Equipment): Nalgene bottles and carboys with 53B closuresUnit Size: Each more