DUOYI best sellers

#1 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

$17.99 on Amazon

#2 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

$159 on Amazon

#3 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

#4 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

$109.99 on Amazon

#5 2PC Temperature Clamps DUOYI 2PC Temperature Clamps HVAC Digital Manifold Gauge Set Digital Refrigerant Gauge

$25.99 on Ebay

#6 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

#7 Refrigeration Digital DUOYI Refrigeration Digital Manifold Gauge HVAC Vacuum Pressure Leak Temperature Test

$125 on Ebay

#8 2PC Temperature Clamps DUOYI 2PC Temperature Clamps / Probe Clip 1.5m Length for HVAC Digital Manifold Gauge

$25.99 on Ebay

#9 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

$85.99 on Amazon

#10 Manometer Gas Pressure DUOYI Manometer Gas Pressure Tester ±241.3Kpa/35Psi Wide Range Digital Manometer Lp Gas Pressure Tester with 11 Pressure Units, MAX/MIN/AVG Measurement, Data Storage/Hold, 9V Battery

$45.99 on Amazon

#11 Manometer Gas Pressure DUOYI Manometer Gas Pressure Tester ±241.3Kpa/35Psi Wide Range Digital Manometer Lp Gas Pressure Tester with 11 Pressure Units, MAX/MIN/AVG Measurement, Data Storage/Hold, 9V Battery

$38.69 on Amazon

#12 Thread Gauge SAE and DUOYI Thread Gauge SAE and Metric Thread Checker Nut and Bolt Thread Checker Standard and Metric Bolt and Nut Identifier Gauge 28 Bolt Size and Thread Gauge Aluminum Alloy Bolt Identifier Board Screw Gauge

$22.99 on Amazon

#13 24V Battery Charger 20A DUOYI 24V Battery Charger 20A 24V Forklift Battery Charger,Fully-Auto Forklift Charger 24 Volt Battery Charger,with 7 Charging Protections 24 Volt Charger,24V Charger For 100-200AH Lead Acid Battery Charger

$109.99 on Amazon

#14 Timing Light Automot DUOYI Timing Light Automotive

$20.59 on Amazon

#15 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

#16 Solar Tester Meter VLT DUOYI Solar Tester Meter VLT UV IR Rejection Meter 0.04In Portable Tint Film Meter with Real-Time Calibration Solar Film Transmission Meter Data Hold Digital VLT Meter with Batteries,Bag

$34.99 on Amazon

#17 Pneumatic Injector Puller DUOYI Pneumatic Injector Puller 24pcs Diesel Injector Puller Set Labor-Saving Diesel Injector Extractor Tool for Diesel Engines Injector Puller Removal Set with Pneumatic Hammer,22pcs Adaptors

$149.99 on Amazon

#18 Bearing Puller No Damage DUOYI Bearing Puller No Damage to Bearing Puller Kit 36-in-1 Wheel Bearing Removal Tool Gear Puller Set with 3 Jaw Puller Set Bearing Separator Blind Hole Bearing Puller Set Internal Bearing Puller Tool

$47.49 on Amazon

#19 Digital Vacuum Gauge DUOYI Digital Vacuum Gauge 0-750000microns Range Micron Gauge HVAC Vacuum Gauge 13 Units Vacuum Gauge Automotive 7/16"-20UNF(1/4" SAE) HVAC Micron Gauge Vacuum Tester with Alarm,Extension Connector

$99 on Amazon

#20 Exhaust Back Pressure DUOYI Exhaust Back Pressure Tester 2.5" HD Pressure Gauge Exhaust Back Pressure Gauge Kit with 6ft Hose Oil Pressure Gauge Shockproof Rubber Cover Exhaust Pressure Gauge,Car Exhaust Pressure Tester

$39.99 on Amazon