Black aviation aluminum rotary pen with durable construction and ergonomic grip. Designed for reliable performance and simple needle adjustments. Key benefits Durable material and finish: Made from aviation aluminum in black for a lightweight yet robust housing that withstands regular use. Wide voltage compatibility: Operates from 4 to 12 volts to work with a variety of power supplies. Stable speed: Runs at 12000 rpm for consistent, even motion during detailed work. Adjustable stroke: Stroke range 0 to 3.8 mm provides control over penetration depth and line character for different techniques. Onepiece pen structure: Needle changes and length adjustments are straightforward and convenient, reducing setup time. Secure RCA connection: RCA interface with an alloy protective layer ensures a tight, wearresistant connection for reliable power transfer. Ergonomic antislip grip: handslip design improves grip comfort and reduces hand fatigue during extended use. Specifications Color: Black Material: Aviation aluminum Working voltage: 412 V Speed: 12000 rpm Stroke: 03.8 mm Interface: RCA interface with alloy protective layer Practical applications Precision line work and shading where consistent speed and adjustable stroke are required. Long sessions that benefit from an ergonomic, antislip grip to reduce hand fatigue. Situations requiring quick needle swaps and onthefly length adjustments for workflow efficiency. Compatibility and usage notes Uses an RCA interface; pair with compatible RCA cables and a power supply rated between 4 and 12 V. Adjust stroke and needle length to suit the specific technique and media being used. Maintain regular cleaning and inspection of the RCA connection and needle assembly to preserve performance. This rotary pen combines durable construction, adjustable performance, and an ergonomic grip to support detailed, extended work while simplifying needle changes and setup.