Specification Brand : Aexit BulletPoint1 : Product Name : Rotary Control Knob;Total Size : 25 x 15mm / 1" x 0.6" (D*H) BulletPoint2 : Inner Hole Diameter : 6.4mm / 0.25";Material : Aluminum BulletPoint3 : Color : Silver Tone BulletPoint4 : Net Weight : 20g BulletPoint5 : Package Content : 1 x Rotary Control Knob Color : Silver ConnectivityProtocol : X-10 InternationalProtectionRating : IP00 ItemName : Aexit 25mmx15mm Aluminum Variable Resistors Good Performance Rotary Control Potentiometer Knob Potentiometers 0.25" Dia ItemTypeKeyword : potentiometers Manufacturer : Aexit Material : Aluminum ModelNumber : modle PartNumber : f190412ae156102 ProductDescription : Aluminum knobs are for sound equipments or rotary potentiometer, for protection and easy control. PU interior is useful to avoid damage and for long time service. Polish making, great decoration accessory for equipments.