We are offering Twin (Dual Size) Sequin Device.device functions : it adopts the combination of straight bearing, guide rail shift and pneumatic element to control up and down of device.the special steel guide groove can change the specification between different blades easily.using the spiring piece to stop the back piece and the pressure can be adjustable, so that it doesn't hurt the sequin.the computer-controlled mechanical device implements automatic shifting to realize the automatic shift.it can embroidery two different specification of sequins or two same ones in the meanwhile.the use of flat sequins and concave sequins will achieve the best effect.the device is installed in the front and it can be installed in the normal embroidery machine and high-speed embroidery machine. technical parameters : sequin embroidery speed:3mm 4mm 5mm 1000rpm6.75mm 9mm 800rpm9mm 600rpmcombination specification of sequin:specification of sequin overlapping embroidery3mm-4mm 3mm- 5mm4mm- 5mm 5mm- 6.75mmspecification of sequin crossing embroidery :3mm-4mm 4mm-5mm3mm-5mm 4mm-6.75mm3mm-6.75mm 5mm-6.75mm3mm-9mm 5mm-9mm.