Features:
1) Auto-lubrication
2) Bottom feed, walking foot
3) Horizontal-axis twice large hook
4) GC0303CX employs thick thread
5) Applications: for sewing medium and heavy weight materials

Specifications:
GC0303 
1) Max sewing speed: 2200spm
2) Needle: DP x 17 18# to 24#
3) Rotating hook: auto-lubricated large hook
4) Max stitch length: 8mm
5) Needle bar stroke: 37mm
6) Presser foot lift height: 6mm by hand, 16mm by knee

GC0303CX
1) Max sewing speed: 2000spm
2) Needle: DP x 17 25#
3) Rotating hook: auto-lubricated large hook for thick threads
4) Max stitch length: 8mm
5) Needle bar stroke: 37mm
6) Presser foot lift height: 6mm by hand, 16mm by knee