The cord guide is attached in place of the clear plastic bobbin cover to feed perle cotton or other cord as you sew for easier corded pintucks. Two guides are included in the set: one for cord up to 1.5mm in diameter and one for cord 1.5 - 2.5 mm in diameter. Use with:MC11000 Special Edition, MC11000, MC6600P, MC6500P, MC6300, 6019QC, 6125QC, 6260QC, 4119 Quilter's Delight, 4045LX, 4052LX, 2041LX, MC7700QCP, JNHMC7700QCP, MC12000, MC4120QDC, MC3160QC, 2160QDC, JHN1860, JNH2030DC, HF18750, HF5812, HF8050, DC1050, MC8200, MC8900, MC9900. Machines with rectangular bobbin cover plate