DUOYI best sellers

#1 DY519 3 in 1 HVAC Digital DUOYI DY519 3-in-1 HVAC Digital Manifold Vacuum Gauge Refrigerant Charging, Vacuum Testing & Leak Detection 24 Refrigerant NIST Compatible High Precision Pressure Meter for AC Pros & DIYers

$42.49 on Amazon

#2 🔥 Earth Ground Resistance DUOYI Earth Ground Resistance Tester 0.03-2000Ω Soil Resistivity Meter,Upgraded Earth Resistance Tester Auto Measurement 600V AC Ground Voltage Meter with 6pcs 1.5V Batteries,Tool Bag

$79.99 on Amazon

#3 Fuel Injector Cleaner DUOYI Fuel Injector Cleaner Kit Universal Fuel Injector Tester And Cleaner Kit,8 Pulse Modes Fuel Injector Cleaning Kit,DIY Fuel Injector Cleaner Tool with 6 Size Cleaning Adapters,12V/5V Output Power

$18.99 on Amazon

#4 🔥 46PCS Compression and DUOYI 46PCS Compression and Leakage Test Kit Petrol & Diesel Compression Tester Kit Automotive Cylinder Leak Down Tester with Dual Gauge Engine Compression Tester Kit for HDI, TDCi, Pumpe Duse Engine

$169 on Amazon

#5 🔥 Digital Vacuum Gauge DUOYI Digital Vacuum Gauge HVAC for Evacuation & Pressure Leak Test, 0~2000mbar Range Pressure & Vacuum Gauges Tester with 4 Units(Torr, mbar, inHg, Hpa),7/16"-20UNF(1/4" SAE) HVAC Pressure Tester

$49.99 on Amazon

#6 Digital Manifold Gauge DUOYI Digital Manifold Gauge Set Refrigeration HVAC Vacuum Pressure Temperature Tester

$129.99 on Ebay

#7 Digital Earth Ground DUOYI Digital Earth Ground Resistance Tester,0-2000 ohm Meter Earth Resistance Tester,Overload Protection AC Ground Voltage Meter with 6Pcs 1.5V Battery,Tool Bag

$74.99 on Amazon

#8 Refrigeration Digital DUOYI Refrigeration Digital Manifold Gauge Set HVAC Vacuum Gauge +Temp Sensor Hoses

$169 on Ebay

#9 Digital Manifold Gauge DUOYI Digital Manifold Gauge Set Air Conditioning/Refrigerator Digital HVAC Gauges Double Pressure&Temp Test Air Conditioning Tools & Equipment Manifold HVAC with Tricolor Hose, 2 Pairs of Test Clamps

$75.99 on Amazon

#10 🆕 DUOYI 36V 25A Smart Golf DUOYI 36V 25A Smart Golf Cart Battery Charger -1250W Fully Automatic Trickle Lithium Charger with IP67 Waterproof Rating ,Orange

$116.99 on Walmart

#11 1pc New DUOYI DY294 Digital 1pc New DUOYI DY294 Digital Transistor DC Parameter Tester US

$52.26 on Ebay

#12 🔥 Digital Gauges HVAC 92 DUOYI Digital Gauges HVAC 92 Refrigerant Recharge Kit, Digital Manifold Gauges HVAC Pressure & Air Tightness Test, Air Conditioning Tools & Equipment with Tricolor Hose, for Cold Storages/Refrigerators

$67.99 on Amazon

#13 🆕 Portable Non contact DUOYI Portable Non-contact Three-Phase Meter Tester Motor Rotation Indicator with LED

$35.99 on Ebay

#14 Coolant Overflow Tank DUOYI Coolant Overflow Tank Universal 2L Aluminum Coolant Reservoir with Level Indicator Radiator Overflow Tank Automotive Engine Cooling System Recovery Kits Compatible with Most Cars

$28.99 on Amazon

#15 🔥 Turbo Boost Leak Tester DUOYI Turbo Boost Leak Tester Kit 10Pcs Turbo System Leakage Tester Kit with 4 Pairs of Stepped Adapters 1-3/8" to 3-1/2" Turbo Pressure Leakage Tester for Turbo,Radiators,Cooling,Emissions System

$29.99 on Amazon

#16 ONE Duoyi DY4300B 4 Terminal ONE Duoyi DY4300B 4-Terminal Earth Resistance 400~500Hz Soil Resistivity Tester

$289.50 on Ebay

#17 🔥 Earth Resistance Tester DUOYI Earth Resistance Tester 0.03-2000 ohm Meter,Upgraded Digital Earth Ground Resistance Tester 2/3 Wire Measurement AC/DC Voltage Meter with Batteries,Tool Bag

$89.99 on Amazon

#18 Axle Spindle Rethreading DUOYI Axle Spindle Rethreading Tool Set Repair/Cleaning Threading Tools High-Strength Tools Set Easy To Store Thread Restorer Use With 1-1/4" Socket Mechanic Tool Set For M20,22,24 13/16 3/4x20 UNF

$25.99 on Amazon

#19 Shock Absorber Removal DUOYI Shock Absorber Removal Tool 9pc Strut Nut Socket 16mm 18mm 19mm 21mm 22mm 24mm Nut Removal Tool Universal Suspension Strut Spreader Tool with 12 Point 1/2 Drive Strut Suspension Strut Socket Tool

$45.99 on Amazon

#20 Tubing Straightener For DUOYI Tubing Straightener For 1/4In Fuel And Brake Line Straightening Tool Rust/Wear Resistant Tube Straightener Handheld Tube Straightening Tool For Coiled Copper,Steel,Stainless Steel,Aluminum Tubing

$38.99 on Amazon