This listing is for 50 Organ DCX27 Industrial Overlock Sewing Machine Needles. 
Needle system : DCX27

DCX27 Needles are also sold under these needle system numbers :

1886, 88X1, B27, B-27, DCX1, DCX27, RIM27, RMX27, MY1023, SY6120, 3027GS

These are round shank needles for industrial overlock machines. Will not work on home portable sergers.

Lower size numbers are narrower or thinner needles used for lighter materials. Higher size numbers indicate a needle of thicker diameter, used for heavier materials. Match your needle system to your machine, then the size of the needle to the product you are sewing.

These are high quality Round Shank needles used on many Industrial Overlock and Sergers including :

for Babylock : BL3-318, BL3-407, BL3-408, BL3-416, BL3-418, BL3-426, BL3200, SL600, SL660, SL700, SL800

for Brother : B511, B531, B551, B561, B571, B611, B621, B641, B651, B661, B671, B672, B681, B682, B691, B692, B901, B952, B958, B959, B971, B959

for Feiyue : FY737, FY747, FY757, FY2000, FY2100

for Juki : MO-800 Class, MO-2400 Class, MO-2500 Class, MO-2400N Class, MO-2500N Class, MO-3300 Class, MO-3600 Class, MO-3700 Class, MO-3900 Class, MO-6700 Class, MOR, MOC, MOF

for Mauser : DC, DCP, DC-MS

for Pegasus : E22-730, E22L-730, E32, E32L, E52, E52L, ETB32, ETB52, ETF32, ETF52, F32, F52, L32, L52

for Rimoldi : 27, 28, 29, 227, 228, 229, 230, 327, 329, 527, 627

for Willcox & Gibbs : 101-E14, 401-02, 401-04, 401-013, 401-E32, 503-04, 503-E, 503-52, 503-ETB 52, 503-ETF 52, 504-4, 504-E 52, ETB 52, ETF 52, 512, 514, 516, DC, DCP, DCR-942, E32, E52

for Yamata : FY737, FY747, FY757, FY2000, FY2100

for Yamato : AZ8000 Class, AZ8500 Class, AZ8600 Class, DC, DCY, DCZ-200, DCZ-203, DCZ-204, DCZ-206, DCZ-216, DCZ-220, DCZ-220W, DCZ-221, DCZ-263, DCZ-264, DCZ-270, DCZ-290, DCZ-292, DCZ-293, DCZ-296, DCZ-500, DCZ-503, DCZ-515, DCZ-520, DCZ-521, DCZ-525, DCZ-545, DCZ-553, DCZ-554, DCZ-700, DCZ-703, DCZ-711, DCZ-715, DCZ-724Y, DCZ-725Y, DCZ-726YZ, DCZ-727Y, DCZ-745, DCZ-746, Z-100, Z-361, Z-362, Z-365, Z-366, Z-367, Z-368, Z1000, Z1003, Z1006, Z1016,Z1020, Z1036, Z1037, Z1045, Z1046, Z1056, Z1057, Z-5000, Z-6000, ZF-1020, ZF-1500

Any many more