Product Name: Double Loops Notebook/Exercise Book/Table Calendar Wire Coil Spiral Comb Binding Machine Model NO.: WB-520 Thickness: 20-50mm Classification of Wire Binding Machine: 21 Hole Classification of Financial Binding Machine: Semi-automatic Type: Wire Binding Machine Trademark: Koten Transport Package: Strong Export Wooden Case. Specification: Export Standard Origin: China Product Description China spiral binding machine is suitable for binding notebooks, calendar,diary books,etc.Video Checking.https://youtu.be/pkwzl1kOcFUSamples.Sizes.Inside diameters of the double loopsSize6.4mm1/4 inch 3: 17.9mm5/16inch9.5mm3/8inch11.1mm7/16inch12.7mm1/2inch14.3mm9/16inch15.9mm5/8inch 2: 119.0mm3/4inch22.2mm7/8inch25.4mm1inch Main Specifications.ModelWB-520Pitch of double wire4: 1" 3: 1" 2: 1"Max. binding thickness(Mould matched additionally)3/16" - 9/16" (520)Binding typeHole binding or skip binding(up to five steps)Max. Paper width520mm(520)Max. Binding width60- 520mm(520)Max. Paper length75mmWorking speed1200books/hrSize of worktable660x300 WxDPower220v/1 ph/50hzAir compressor1.5kwAir pressure6-8barMain size1030x770x1200mmWeight220kgsDimension of pay-off490x760x1220mmNet weight of pay-off65kgsOptional Hanger Attachment.Koten Machines Loaded Into Container At the Ningbo Port.Koten Brand Machines In The Clients' Factory.Factory Production.