Heater soldering iron tools are easy to use and can bring you much convenience Small size and light weight With long service lifetime and perfectly designed Made of high-strength and heat-resistant copper for durable use It has high safety and stable performance Quite easy to take and clean Model: 900M-T-I Suitable For: 936, 937 Outer Diameter: Approx. 6mm/ 0.24" Inner Diameter: Approx. 4mm/ 0.16" Length: Approx. 4.2cm/ 1.65"