#1:12AX7 TO 6N2: Material introduction. Outer casing: Bakelite. Top socket: Bakelite, copper plated gold. Bottom pins: copper plated gold. Size introduction: Diameter: 23mm (0.9in). Total height (including pins): 27mm (1.06in)....

Features:  - The tester uses 3.7V rechargeable lithium battery. (battery model: 14500)  - With MINIUSB port,it can power the tester, or charge for the 14500 battery.  - One key measurement...

Features:  - The material it uses is safe and nontoxic and has no odor.  - Lovely designs make babies fall in love with baths.  - It will be a perfect...

Feature:  Build 58 projects investigating alternative strategies.  Experiments included: Lamp, Fan, Music Door Bell, Morse code and more.Light,megnet,hand and sound control are involved.  Contains: Photoresistor, Music IC, LED, Bulb, Buzzer,...

Specification:  Net weight: 97G.  Packaging size: 270*200*10mm.  Composite finished product size: 90*90*130mm.  Colour: Log colour.  Material: Wood.     Features:  - Training of Practical Ability.  - Types of Science and Education:...

Specifications:  Material: Wood.  Multi-function: No.  Power supply: 2x AA Battery(not included).  Foreign trade: Yes.  Static model: No.  DIY: Yes.     Applications:  Creeping, interest-building, parent-child communication, emotion, sensory, intellectual development, hands-on...

Specifications:  Material: ABS(Acrylonitrile Butadiene Styrene).  Magnification: 1200X, 400X, 100X.  Objective lens: 10x, 40x, 120X.  Standby light source: LED light (using 2 AA batteries, not included).  Color: Black&White.  Object Stage: Single...

Specification:  Net weight: 189.4g.  Packaging size: 395*285*5mm.  Composite finished product size: 140*140*55mm.  Colour: Log colour.  Material: Wood.     Features:  - Training of Practical Ability.  - Types of Science and Education:...