1. Excellent designed gold plated OFC contact
2. Chassis Mount on top or bottom.
3. 26.5mm diameter opening.
4. Fit for: 5AR4/GZ34 5R4GY 5U4G 6AS7G 6B4G 6BL7GT 6F6 6J5 6J7 6L6 6SJ7 6SL7 6SN7 6V6 274B 348A 350B 421A 5691 5692 5693 5881 6336 6550 7199 EL34 EL37 GZ32 GZ34 KT66 KT88 etc.

The top one Tube Socket of Teflon is take the unique design idea of tube. The insulator is use the top material of Teflon that is expensive and hard to obtain (It can be used under -180℃ ~ +260℃ temperature without load, and it has the lowest friction coefficients in known solid materials.). The design of Three-dimensional can increase the area of contact. To strengthen the contact and raise the life of tube, good conductivity of tube makes perfect timbre.