420-1779 main air filter matched with 420-1781 safety air filter for CAT heavy construction equipment. Blue polymer-coated primary filter paper blocks massive dust and sand; fine secondary filter traps tiny residual particles. Integrated elastic rubber seal avoids air bypass. Oval honeycomb structure provides large filtration area for stable air intake. Direct OEM replacement set, full size matching original housing. Strict air flow and dust holding tests finished, packed in single kraft carton for heavy-duty engine maintenance.

• ISO 9001 certified.
• 100% pressure, flow, and leakage tested before shipment to ensure quality.
• Comply with construction machinery hydraulic component industry standards.

• 10+ years of professional experience in manufacturing excavator hydraulic parts, mature technology, stable quality.
• Sufficient inventory, ready stock for popular models, fast delivery.
• Support OEM/ODM customization, develop special models per customer requirements.
• Complete after-sales team, provide technical consultation, installation guidance, troubleshooting.

• Free replacement or repair for non-human quality issues within warranty period.
• Provide technical support for installation, commissioning, and operation.
• Lifetime supply of wearing parts and maintenance services at cost price.

ISSUES YOU MAY BE CONCERNED ABOUT
HERE IS THE ANSWER!

Q1:How long is the warranted time?

A:For natural broken, 3 months. Guarantee genuine parts.

Q2: What's payment you can accept?

A:T/T, WECHAT,PAYPAL.

Q3: What's package? Can you give me the package according my requirement?

A:Yes, Original packing or Neutral packing with wooden box or carton.

Q4: How about the lead time?

A:(1) ln stock: 1-7 days.Always in 72 hours.
(2) Out of stock: lt's according to your quantity, and we have cooperated with factory.
We will let you know when we quote.

Q5: What's the shipping way you can offer?

A:(1) Big order: By sea or by air.(It can reduce the costs).
(2) Small order: DHL,TNT,UPS,FEDEX,EMS,ARAMEX.

Q6: What's the terms of the transaction?

A:EXW,FCA,FAS,FOB, C&F,CIF,CPT,CIP,DAF,DES,DDP.

Q7: Do you accept small order?

A:Yes, small order can accept.

Q8: What's brand you can offer in your company?

A:(1)OEM,100% GENUINE PARTS, COPY(Made in China).
(2)GENUINE PARTS.

Thank you for attention!