Replacement tube shields for amplifiers. Fits most 9 pin sockets that accept a shield, but may not fit older Marshall amps such as the JMP and JTM series. The socket is not included. Great for 12AX7, 12AT7, 12AU7, and other small 9 pin preamp tubes. Made of anodized aluminum. 1 7/8" tall, approx 1 1/8" mounting centers.