The D'Addario ECB81 Chromes Flatwound set, made of stainless steel, is designed for 4-string bass guitars and offers a smooth playing feel along with a warm, mellow tone that is ideal for jazz, blues, and classic rock styles. This set includes gauges of 0.045, 0.065, 0.080, and 0.100 inches (equivalent to 1.14 mm, 1.65 mm, 2.03 mm, and 2.54 mm), ensuring balanced tension and reliable performance across all strings. The strings are crafted from stainless steel with a flatwound design, which reduces finger noise and enhances playability, making them suitable for both studio recordings and live performances. The flatwound surface provides comfort for the player while maintaining consistent intonation and durability. D'Addario, a trusted manufacturer in the music industry, produces these strings to high standards to meet the needs of both professional and amateur bassists. The ECB81 model is known for its stable tuning and corrosion resistance, contributing to a long lifespan with regular use. These strings are compatible with most 4-string bass guitars and are a popular choice for musicians seeking a vintage sound with modern reliability. The packaging clearly displays the gauges and model number for easy identification. The material composition and gauge specifications support an informed selection.