Specifications:

・Made in Japan, designed/developped by Amtrans
・Socket-base is made of ceramics with 95% alumina. Thermal conductivity is about 10 times higher than conventional steatite ceramics. It restrains the increase of tube temperature and contributes to longer life of the tubes.
・Gold plating directly on the phosphor bronze without using nickel ground lowers magnetic distortion and creates quality of sound.
・Adopt the reliable pin-shape being used for more than 70 years
・Connectable to the chassis by using holes of flange. It helps you to set face-direction of tube by the step of 30 degrees.
・Fits KT88/KT77/KT66/EL34/6550/6L6GC
・RoHS compliant