Features Specifications:Sell 2.5" Freon gauge  Freon pressure gauges are used in refrigeration application for testing, servicing, and charging Dial features: R-12, R-22 and R-502 OR R-304 scale  Recalibrator and restrictor as standard features Sizes: 63 Case material: steel Tube: phosphor bronze Socket and movement: brass Connections: 1/8 and I/4 inches NPT in LM bottom dependent on model and size, bottom, back, left and right side Available ranges: 30-inch Hg VAC to 150psi retard to 350psi: 0 to 500psi Window (lens) material: threaded polycarbonate lens acrylic Accuracy: 2.5 Options and accessories: custom dial, metric scale, DIN 2, 5% accuracy, special connections