Are these made of copper or bronze? The ad says copper, but they look like bronze. Copper would immediately corrode to a green color...

Not made of copper. Their value in weight would cost more in scrap than this price. I would say it feels like a yellow dyed piece of aluminum. The cheapest yellow alloy metal there is? That is what this is probably made from. Dont worry about corrosion. But if you did have copper terminals, a green discoloration would be a side effect worth tollerating.

What size should i get for a 12-volt battery for a car? (2007 mitsubishi galant w/3.6l v6)

Don't worry about size anything that is a 12 volt they will fit. Just make sure the negative and positive are thick enough to go to the main feed

What thread are the screws?

Hello, the diameter of the screw is 5.8mm.

sae or metric hardware? 1/4 20?

The battery terminal connectors fit for SAE Terminal Post. The range of the application of the negative pole is 0.63~0.69 in, the positive pole is 0.69~0.75 in, you can see the size image for more detailed information.

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Battery Terminal Connectors

Product ID: 418273840

Details

Brand
ZONBANG
Circuit Type
4-way
Connector Type
Quick
Contact Type
Normally Open
Item dimensions L x W x H
4.9 x 3.35 x
Material
Copper

⚡Superior conductivity & low voltage loss

🔌4-way multi-cable posts

🛡️Corrosion-resistant tinned copper

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Rp359646

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Description

🔋 Power up your ride with connectors that mean business!

BUILT TO LAST - Engineered with corrosion resistance to keep your connections flawless over time.
INSTANT CLARITY - Clearly marked positive (+) and negative (-) terminals eliminate installation guesswork.
ALL IN ONE PRO KIT - Includes terminals, insulation sleeves, cleaning brushes, anti-corrosion washers, and allen wrench for hassle-free setup.
POWER WITHOUT COMPROMISE - Tinned copper terminals ensure top-tier conductivity and minimal voltage distortion.
CONNECT MORE STRESS LESS - 4 posts for seamless multi-cable connections—perfect for SAE JIS Type A batteries.

ZONBANG Battery Terminal Connectors offer a professional-grade 4-way quick release design tailored for SAE/JIS Type A car batteries. Crafted from corrosion-resistant tinned copper, these terminals deliver superior electrical conductivity and reduce voltage loss. The kit includes everything needed for a clean, reliable installation—making it the go-to upgrade for cars, trucks, RVs, and more.

Specifications

ASIN	B0BYJY1VVZ
Best Sellers Rank	#51,295 in Automotive ( See Top 100 in Automotive ) #175 in Automotive Replacement Battery Terminals & Ends
Brand	ZONBANG
Customer Reviews	4.1 4.1 out of 5 stars (63)
Date First Available	March 18, 2023
Exterior	Metallic Finish
Is Discontinued By Manufacturer	No
Item Weight	10.5 ounces
Manufacturer	ZONBANG
Manufacturer Part Number	2-S-BRUSH
Product Dimensions	4.5 x 1.7 x 3.5 inches

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Rp359646

Duties & taxes included

In stock

Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Indonesia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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