Long-arm Quilting Machine Class "M" Metal Bobbins - 20 Pk. Gammill Tin Lizzie 18 Cutex Brand Long-Arm Quilting Machine Class "M" Metal Bobbins - 20 Pk. Gammill Tin Lizzie 18 M size bobbins measure 1" in diameter and 3/8" thick These high quality bobbins will fit following long-arm quilting machines : Baby Lock Jewel 18" Gammill Quilters Handiquilter HQ Sixteen Nolting's : Quilter Master Pfaff Grand Quilter 18" Queen Quilter 18" Tin Lizzie 18 Regular models and 18 LS models Viking Mega Quilter 18" Machines & Frames