Check the listing for details. IRWIN STRAIT-LINE 8-oz Standard line chalk. Condition: New, Made in China. Listed at 6.27 USD. The Line 6 Processor is a digital unit designed to be used with electric guitars. It multiplies the guitar's signal with a built-in processor, offering a wide range of effects and features to enhance the sound of the instrument. This specific model is a versatile choice for musicians looking to experiment with various effects and customization options while playing their electric guitar.