This helps to resist the dial indicator "bounce" associated with many other lower quality gauges. 
4pcs*hoses: φ8 × φ5 × 1500 mm
4pcs*extension tubes: M5 × 0.8 × 100 mm
4pcs*extension tubes: M5 × 0.8 × 170 mm
4pcs*Conical connector: φ10×53 mm (M6)
4pcs*Conical connector: φ10×60 mm (M6)
1pc*piece of tapered connector: φ10 × 55 mm (M6)
Pressure range: 0~76 cmHg
Packing: Blow mold case