We have three types with different turns per time MODEL NO. RTM-230 RTM-400 RTM-510 Max Tying Diameter 21mm 40mm 50mm Time of Making a Knot 0.8seconds 0.9seconds 1.0seconds Voltage DC9.6V DC9.6V DC9.6V Weight 2.15KG 2.2KG 2.25KG Turns per Tie 2turns/3turns 2turns/3turns 3turns/4turns Ties per Coil Approx. 260ties(2turns) Approx. 160ties(2turns) Approx. 100ties(3turns) Ties per Charge over 1000ties over 900ties over 800ties Length of wire for Tying 380mm/2turns 510mm/3turns 600mm/2turns 780mm/3turns 1100mm/3turns 1350mm/4turns Dimension 270mm*100mm*296mm 285mm*100mm*296mm 300mm*100mm*296mm