What size is the servo horn/arm?

There are three arms provided with each servo. Two double arms approx 1 1/4" overall length (one has 2 additional small arms as per the picture) and one single arm approx 3/4" overall length

Will these handle signals between 800 and 2200 microseconds? When I use a test box they get very jittery above 2000 microseconds.

Dear, thank you for your question. The jitter is caused by the unstable analog signal power supply. It is recommended to use 600-2400 pulse width. I hope it can help you

There are three wire leads on the servo. Assuming the black wire is the ground which is the power lead, red or orange?

Red is power, yellow is the PWM.

Will these connectors fit a Spektrum SR515 receiver

These servos have a standard 3 pin connector without a tab that fit Futaba, JR, and Hitec receivers. If you receiver has standard 3 pin connections they should work.

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Sg90 9g Micro Servo Motor for Arduino RC Car Robot Boat Plane 5Pcs

Product ID: 123819006

Details

Brand
Miuzei
Item Weight
9 g
Material
Metal
Model Name
sg90 9g servo
Number of Items
5

🔩Metal gears for durability

⏱️0.08 sec/60° lightning speed

⚙️9g ultra-lightweight precision

S$24

Duties & taxes included

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Description

⚡️ Micro Power, Mega Control: Dominate your DIY projects with precision and speed!

FEATHERWEIGHT POWER - At just 9 grams, this micro servo delivers precision without the bulk—perfect for sleek, agile RC builds.
BLAZING FAST RESPONSE - Achieve near-instant 0.08-second rotation at 6V for ultra-responsive control in drones, robots, and RC vehicles.
ROCK SOLID DURABILITY - Metal gear construction ensures long-lasting performance and resistance to wear under intense DIY projects.
VERSATILE 180 RANGE - Wide-angle rotation lets you engineer complex movements in robotic arms, planes, boats, and more.
UNIVERSAL COMPATIBILITY - Seamlessly integrates with Arduino, Raspberry Pi, JR, and Futaba interfaces—your go-to servo for any creative build.

The Miuzei SG90 9g Micro Servo Motor is a compact, metal-gear digital servo delivering fast 0.08-second rotation at 6V and 180° movement range. Lightweight at 9 grams, it’s compatible with Arduino, Raspberry Pi, and popular RC interfaces, making it ideal for drones, robots, RC cars, and DIY electronics. Sold in packs of 5, it combines durability and precision for professional-grade remote control applications.

Specifications

ASIN	B07NSVKZP7
Best Sellers Rank	#24,206 in Toys & Games ( See Top 100 in Toys & Games ) #7 in RC Servos
Brand Name	Miuzei
Customer Reviews	4.5 4.5 out of 5 stars (1,126)
Included Components	servo horn
Item Highlight	Mini, Small, 9 Gram, Metal Gear, Digital, 180 Degree, Steering Servos for Rc Airplane Helicopter Robotic Arm Diy
Item Weight	9 g
Manufacturer	Miuzei
Material Type	Metal
Model	sg90 servo
Model Name	sg90 9g servo
Number of Items	5
Number of Packs	5
Part Number	sg90
UPC	657390343417

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