2-3 Weeks. 45 Day Lowest Price - 100% Satisfaction Guarantee. Carefully handcrafted with wood and a specially formulated resonant fiber material. Durable mutes designed to produce an in-tune, vibrant, warm and responsive sound that blends well with other instruments.This cup mute is suitable for symphonic, studio or solo playing. Its adjustable cup adapts to all bell sizes, and allows for a great variety of tonal flexibility. The Classical Cup is responsive and in tune throughout all registers.