MEROCA M4 Four-piston hydraulic brake, mountain bike hydraulic disc brake

This is a MEROCA M4 four-piston hydraulic disc brake installation video.
Brand: MEROCA
Model: M4
Piston: 4 pistons
Applicable handlebar: 22.2mm
Material: aluminum alloy
Weight: about 647g/pair
Length:
Front brake 800mm; rear brake 1400mm.
About the model:
LR-RF：Left Rear Right Front brake
LF-RR: Left Front Right Rear brake
There are two specifications of bicycle brakes, and the simple way to distinguish them is:
The left hand brake lever controls the rear brake, please select the LR-RF
The left hand brake lever controls the front brake, please select the LF-RR
Purchase Notes:

①Please remove the caliper protection block before installation, and do not press the brake lever without protection, otherwise the oil pipe will be damaged.
②By default, it is suitable for 160mm brake rotors. If you need to install rotors with other specifications, you need to purchase the corresponding IS-PM adapter.
③If You Have Any other Questions, You Can Contact Us, And We Will Help You Within 24 Hours.

[CuriousGamer]

Bout to get these, only £28 on aliexpress and the reviews r great so guessing they r as reliable as shimano??

[amp-ws]

does these come already working or do you have to fill it up yourself

[xp]

Eu, tenho esse meroca 4 pistões, o segredo e troca as mangueiras e oliva , especialmente da shimano ☠️ o resto e lapada, no freio 😮😮😮😮 as mangueira que vem, na meroca e toda ruii 😂