The MUELLER ELECTRIC BU-29-0 is a black insulator specifically designed for use with the 27 clip. This durable and high-quality insulator provides reliable protection and insulation for an array of electrical applications. Its sleek black design adds a professional touch to any project, ensuring both functionality and aesthetics. Compatible with the trusted 27 clip, this insulator is an essential component for securely connecting and insulating wires. Trust MUELLER ELECTRIC for all your electrical needs, and choose the BU-29-0 black insulator for the optimal performance and safety of your electrical connections.