the description says set x2. Is this 2 or 4 propellers in this item?

the 10x45 MR pack has 2 propellers. One CW and one CCW

Are these compatible with husban 501 A

Not without substantial modification

Will these work with hglrc batman 220 drone?

Not sure, I use these for home built 2 motor drones and they work great, will definitely be ordering more. Best thing is to see if they fit and if they do order up and give it a try.

Where can i get an adapter for a motor with a 4mm shaft? This package i received does not contain any.

Hi, James. Here is a link to our adapters: https://www.amazon.com/dp/B07PC42QQ8?ref=myi_title_dp If Amazon hides the link, please put a search for "Master Airscrew Multifunctional Adapter Rings". Unfortunately our adapters pack does not contain a 4mm ring. The sizes available are 1/8”, 3/16”, 5/16”, 3mm, 5mm, 6mm. If your motor's shaft is a different size, the adapters will not be of any use in which case it will probably be best to return the propellers. Hope this helps. Best regards, MAS team

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Master Airscrew/Windsor Propeller MR - 10x4.5 Propeller Set x2 Black MASMR1045B Propellers Electric Plane

Master Airscrew/Windsor Propeller MR - 10x4.5 Propeller Set x2 Black MASMR1045B Propellers Electric Plane

Product ID: 47823681

Details

Brand
Master
Color
Black
Global Trade Identification Number
Item Weight
13.61 g
Manufacturer
Master
Material
Plastic

📏10-inch blade size for optimal lift

🪶Ultra-lightweight 12.8 g blade weight

⚙️6 mm adjustable shaft for versatile fit

Description

🚀 Elevate your drone game with precision and power!

LIGHTWEIGHT DESIGN - At just 12.8 g per blade, enjoy longer flight times and agile maneuvers.
ADJUSTABLE 6 MM SHAFT - Seamlessly fits multiple drone models for ultimate compatibility.
BALANCED ROTATION PAIR - Includes 1 clockwise and 1 counterclockwise prop for smooth, stable flight.
PRECISION ENGINEERED 10 BLADES - Maximize thrust and efficiency with perfectly sized 254 mm blades.
TRUSTED MASTER AIRSCREW QUALITY - Join thousands of drone pros who rely on proven performance and reliability.

The Black 10x4.5 Propeller Set by Master Airscrew features 10-inch blades with a 4.5-inch pitch, an adjustable 6 mm shaft, and ultra-lightweight 12.8 g blades. Designed for multi-rotor drones, this balanced CW/CCW pair enhances flight efficiency and stability, making it a top choice for drone enthusiasts seeking improved performance and longer flight times.

Specifications

ASIN	B0734CF553
Best Sellers Rank	#519,694 in Toys & Games ( See Top 100 in Toys & Games ) #1,438 in RC Vehicle Propellers
Brand Name	Master Airscrew
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (89)
Global Trade Identification Number	00607370099025
Item Weight	13.61 g
Manufacturer	Master Airscrew
Material	Plastic
Model Number	MR10X45SB2
Part Number	MA.MR
UPC	607370099025
Unit Count	2 Count

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