DUOYI best sellers

#1 Power Circuit Probe Tester DUOYI Power Circuit Probe Tester 6V-24V DC Test Light Short Circuit Tester Component Activation Electrical Tester Polarity Identify Continuity Tester with LED Light, Long Test Lead, Overload Protection

$16.99 on Amazon

#2 Air Quality Monitor Indoor DUOYI Air Quality Monitor Indoor Air Quality Tester HCHO/CO2/TVOC/Temp/Humidity 5 in 1 Indoor air Quality Meters High Precision Sensor Smart air Quality Monitor with HD Backlight,Smart Reminder

$32.99 on Amazon

#3 Upgraded Compression DUOYI Upgraded Compression Ring Removal Tool Not Damage Copper Pipes/Brass Nuts Ferrule Puller for NPT 1/2” 3/4” Pipe Olive Puller Removal Tool Anti-Rust Ferrule Removal Tool Compression Sleeve Puller

$17.99 on Amazon

#4 Olive Puller Not Damage DUOYI Olive Puller Not Damage The Pipe Olive Remover Ferrule Puller Corrosion-Resistant Compression Ring Removal Tool Suitable for Brass Pipes with Diameters of NPT 1/2" & NPT 3/4" Ferrule Removal Tool

$17.99 on Amazon

#5 Gear Puller Set 2/3 Jaw DUOYI Gear Puller Set 2/3 Jaw Puller Set Bearing Puller Kit 3",4",6 ",8 "Pulley Puller Tool Dual Hole Adjustable Gear Hub Pulley Puller Reversible Jaws Wheel Puller Tool for Ball Races/Flywheels/Sprockets

$129.99 on Amazon

#6 DUOYI Natural Gas Leak DUOYI Natural Gas Leak Detector Portable Flammable Gas Detection Pen Methane Propane Butane LPG LNG Combustible Gas Leak Locator Gas Sniffer Alarm Monitor Sensor for Home (Batteries Not Included)

$15.99 on Walmart

#7 Spark Plug Tester 0 to DUOYI Spark Plug Tester 0 to 6000rpm Adjustable Spark Tester with Two Spark Plug Socket 100-240v with Protective Cover Ignition Tester Heat Resistance Spark Tester Automotive Tools for 14mm/16mm Spark Plug

$30.99 on Amazon

#8 Boost Leak Tester kit DUOYI Boost Leak Tester kit Cooling System/Turbo System Leakage Tester,10Pcs Turbo Boost Leak Tester Kit with 4 Pairs of Stepped Adapters 1-3/8"- 3-1/2",Leak Down Tester Kit for Radiators,Coolers,Pipe etc.

$59.99 on Amazon

#9 Spark Plug Tester Dual DUOYI Spark Plug Tester Dual Holes Spark Tester Working Frequency 0-6000rpm Spark Plug Tool for 12V Gasoline Vehicles Ignition Coil Tester with A Protective Cover, Spark Plug Not Included

$30.99 on Amazon

#10 Thread Chaser Set 42Pcs DUOYI Thread Chaser Set 42Pcs Thread Repair Tool UNC/UNF/Metric Thread Chaser Rethreading Kit with 21 Rethreading Dies,19 Rethreading Taps,2 SAE Thread Files Thread Repair Kit for Most Metals

$39.99 on Amazon

#11 6Pcs Wiper Arm Puller DUOYI 6Pcs Wiper Arm Puller Doesn't Damage The Wiper Arm Removal Tool Strong Structure Windshield Wiper Arm Removal Tool with Toolbox Battery Terminal Puller Compatible with V.W/B.MW/F.ord/H.onda/P.orsche

$45.99 on Amazon

#12 Upgraded Manometer ±100Kpa/14.5Psi DUOYI Upgraded Manometer ±100Kpa/14.5Psi Wide Range Manometer Gas Pressure Tester Dual-Port Digital Manometer HVAC 12 Measurement Units Manometer Lp Gas Pressure Tester with Battery,5 Hoses Manometer Gauge

$59.99 on Amazon

#13 🔥 Timing Light Automotive DUOYI Timing Light Automotive Engine Timing Lights 12V Ignition Timing Light with Strobe Lamp Inductive Timing Tool Kit Reverse Polarity/Overload Protection Ignition Timing Tool with 4.5ft Lead

$19.59 on Amazon

#14 Refrigeration Digital DUOYI Refrigeration Digital Manifold Gauge Set for Air Conditioning/Refrigerator Digital Gauges HVAC with Double Pressure&Temp Test Manifold Digital, HVAC Gauges with Hose, Temperature Control Clip, Toolbox

$119.99 on Amazon

#15 DUOYI Refrigeration Digital DUOYI Refrigeration Digital Manifold Gauge Set HVAC Vacuum Pressure Temperature Tester Kit Air Conditioning R134a Refrigerant Freon Diagnostic Tool

$152.99 on Walmart

#16 🔥 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

$59.99 on Amazon

#17 Olive Puller for G1/2 DUOYI Olive Puller for G1/2 & G3/4 Ferrule Removal Tool Not Damage The Pipe Ferrule Puller Abrasion & Corrosion-Resistant Compression Sleeve Puller Labor-Saving Compression Ring Puller Plumbing Tools

$17.99 on Amazon

#18 Thread Chaser Set 48Pcs DUOYI Thread Chaser Set 48Pcs Thread Repair Kit,UNC/UNF/Metric Thread Restoring Files Tap and Die Kit,with 24 Rethreading Dies,22 Rethreading Taps,2 SAE Thread Files Thread Restorer,for Most Metals

$54.99 on Amazon

#19 Radiator Overflow Tank DUOYI Radiator Overflow Tank 2L Universal Coolant Overflow Tank Aluminum Radiator Overflow Tank Visible Coolant Level Radiator Expansion Tank Used To Prevent Coolant Leakage Coolant Recovery Tank

$49.99 on Amazon

#20 DUOYI Digital Manometer DUOYI Digital Manometer Dual Port Gas Air Pressure Tester Handheld Differential Pressure Gauge Measuring Meter with LCD Display, Green

$34.99 on Walmart