*A needle system is a group of needles made to fit specific sewing machines. All needles in a system are of the same length and shank size, but are of various diameters. 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.

88X1 Needles are also sold under these style numbers :

1128, 88X1, 88X9, 44X3, DAX1, DAX9, SY1315, SY1361

Sewing machine manufacturers use different style numbers for the same exact needles.

88X1 system needles will fit Singer 95 class sewing machines and others including :  

Singer : 46K37 / 63-5,7,8 / 88 class / 95 class / 120U-3 / 141W1, W2, W4 / 195K1, K5 / 241-1, 11, SV10, SV13 / 245-1 / 251-1, 4, 11, 21, 24 / 281-6, 21, 24, 164 / 291-A1, U1 / 325K2, U1, U2 / 400W1, W4, W9-W15, W21, W24, W29-W31, W33, W101, W107, WSV10, WSV15 / 451K1, K5, K11, K21, K25, K31, K41, K45, K51, KX33, KX43, KX45, W21, W25, W31 / 600W1, W21 /  660A1, A51, K1 / 2281B221, B224, B364