Add to favorites
EXNAVI 4 Piston Hydraulic Brake Repair Parts Upgrade kit Ceramic Piston Perfect Substitute for Shimano Brake Caliper 4-Piston M640 M810 M820 M7120 M8020 M8120 M9120
Brand: EXNAVI
Condition: Used
$2714
$2999
-10% Save $285
Updated: 8 hours 53 mins ago
Description
Only suitable for Shimano MT420 MT520 M640 M6120 M7120 M810 M820 M8020 M8120 M9120, not applicable to other than these models
Extreme environment tolerance: Working heat resistance is greater than 400 degrees Celsius, with heat insulation and heat resistance effect
Top material safety guarantee: Automotive-grade brake synthetic phenolic resin，The same material standard as motor car , impact resistance, aging resistance, solves the fatal defect of traditional ceramic pistons that are fragile and cause oil leakage
Turbofan airflow design with eight-point contact with the piston for better heat dissipation
Strong and durable, no breaking or cracking, Solve the original brake ceramic breaking and oil leakage problem, No worries about oil leakage
4 piston Hydraulic brake repair parts Upgrade kit Advantages: It has the effect of heat insulation and heat resistance, the maximum heat resistance is 750 degrees Fahrenheit, does not break or crack, and prevents oil leakage from the clamp. Material:Phenolic Resin + NBR Colour:Black Purpose:Suitable for Shimano M640 M810 M820 M7120 M8020 M8120 M9120 clamp Packing 2 x 17.2mm piston; 2 x 15.1mm piston; 2 x 17.2mm NBR rectangular sealing ring; 2 x 15.1mm NBR rectangular sealing ring; 2 x sealing rings for brake caliper 0.236 x 0.059inch(6 x 1.5mm); 2 x sealing rings for line connection 0.2559 x 0.0394inch(6.5 x 1mm). Warning, only applicable to mineral brake fluid!
Sold by
Amazon Warehouse
Official Amazon outlet for open-box & returned items
- Backed by Amazon's A-to-Z Guarantee
- 30-day return policy
- Ships from Amazon fulfillment centers
- Price verified on Amazon
Product Details
- SKU:
- awhd-us-b0915f8dp4
- Model:
- EX-2021CA1
- Country:
- US
- ASIN:
- B0915F8DP4
- UPC:
- 766884045987
Shopping Smarter
Common questions about buying open-box and refurbished.
Why buy refurbished or open-box?
Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $3 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.
What's the difference between open-box and refurbished?
Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.
Why use OpenBoxFox?
Finding refurbished deals is time-consuming — you'd have to check Amazon Warehouse, Reebelo, Dyson Outlet, and others separately for EXNAVI products. OpenBoxFox aggregates these listings in one place, so you can compare and find the best deal without the legwork. We update pricing daily so you always see current availability and real savings.
Is it safe to buy refurbished?
Yes. Products listed on OpenBoxFox come from established retailers like Amazon, Reebelo, and Dyson — not unknown third-party sellers. Each retailer has buyer protection policies, return windows, and in some cases warranties. You get the price advantage of used goods with the purchase security of a known retailer.