Dwyer Visi-FloatŪ Flowmeter, Model VFB, 4 in. scale. Accuracy ą3% of full scale. Meter bodies are machined from solid clear acrylic plastic. Scale is hot pressed into body. Will withstand pressures up to 100 psi. and temperatures up to 150F. Tapped in back for 1/8 in. NPT. Metal mounting inserts in back with Buna N o-rings. Dual range in English & metric available on some models. Range, to be selected from list below, must be provided at time of order. Price is dependent on fittings and range seleted. Enquire about price when ordering. Specifications: VFB-50: 0.3-3 scfh Air, VFB-91: 1-10 scfh Air, VFB-51: 2-20 scfh Air, VFB-52: 4-40 scfh Air, VFB-53: 10-100 scfh Air, VFB-54: 15-150 scfh Air, VFB-55: 20-200 scfh Air, VFB-90: 0.3-3 scfm Air, VFB-60: 100-1000 cc/min Air, VFB-65: 0.2-4 l/min Air, VFB-66: 1-10 l/min Air, VFB-67: 1-20 l/min Air, VFB-68: 3-30 l/min Air, VFB-69: 4-40 l/min Air, VFB-82: 2-30 cc/min Water, VFB-80: 0.5-12 GPH Water, VFB-83: 1-20 GPH Water, VFB-84: 6-40 GPH Water, VFB-81: 6-60 GPH Water, VFB-85: 0.2-2 GPM Water, VFB-86: 0.5-5 GPM Water.