JK-5745 JK-5745 Double-needle Lockstitch Sewing Machine Series TECHNIC PARAMETER SHEET JK-5745-3 Light to Medium heavy material。 DP*5 11-14# 2 5 7-13 3500 1/8” 5/32” 3/8” 670*350*635 40.5/47.5 JK-5745-7 Medium heavy weight DP*5 18-2# 2 7 7-13 3000 1/4” 5/16” 1/2” 670*350*635 40.5/47.5