Blue-White Series F-400N offers a one-piece, durable, highly polished, machined acrylic meter body. It has direct reading on permanent scales, and a white or yellow back reflector for easy reading. Series F-400N has F/NPT adapters with high grade FKM o-rings and aluminum "stress ring" thread supports with 316 stainless steel or Hastelloy® rod floats. Series F-400N may be used in direct sunlight applications. Series F-400N offers the following scale ranges; 0.025 to 5.0 GPM, 0.1 to 20 LPM, 0.20 to 20 SCFM and 0.4 to 34 M³HR; scale length is 100mm (4").