Bed dimension: Length: 20.4" (517 mm) Width: 7" (178 mm) Space to right of needle: 9.9" (251mm) Diameter of machine pulley: 3.6" (91.9 mm) effective for V-belt Alternating movement: 3.0 7.0 mm Needle bar stroke: 1.4" (36.0 mm) SINGER Needle Cat No: 3355-01 Motor required: SINGER clutch motor low speed 1/2 H.P. Needle gauge size for 4412A: 3/16" (4.8 mm) 1/4" (6.4 mm) 5/16" (7.9 mm) 3/8" (9.5 mm) You may also be interested in the product(s) below: