Singer knitting machine YC6 4 colour changer. Came with a machine I purchased I have never used it and looks like it has not had much use still got parts wrapped in plastic. Box is faded. I googled it and this is the information I found. Can be used on single or double bed combinations .takes up to 4 colours. It can automatically alternate any 2 colours row after row or push button to knit 3rd in 4th colour. Enables you to knit Fairisle where one colour the background stays constant. Fits standard gauge machine Works on ribber SRP50 SRP60 SRP60N Main bed SK210,280,360,500 ,560,580,700,740,840 Comes with instruction book and punch cards Can collect from the Woolston area