The main manufacturers of Circular knitting machines (double knit) are Mayer & Cie, Terrot, Monarch, Jumberca, Orizio, Albi, Fukuhara, Camber, Pai lung, Textima, Pilotelli, Vignoni, Morat, Sulzer.

The main model of Circular knitting machines (double knit) are OVJA, I3P series, UP series, Inovit, Zenit Open, V-8ME22, FLG II, FHG, FIL, UCC series, V-71R, CMO-AN, MIL, Relanit, UFX-3SK, TLJ-6E, MJD, XSMJ, MK7, RJ-72E, FV 2.0, UMT, IHLGII, DWN 3E, VX-NY2RD4, CO5.

HS Code 8447 - Knitting machines, stitch-bonding machines and machines for making gimped yarn, tulle, lace, embroidery, trimmings, braid or net and machines for tufting.

HS code 8447 11 10 - With cylinder diameter not exceeding 165 mm : - Electrically operated

HS code 8447 12 10 - With cylinder diameter exceeding 165 mm : - Electrically operated

Circular knitting machines double knit are also called circular knitting machines double jersey.
In double jersey the fabric is weft knitted by two sets of needles. Both faces of double jersey knitted fabric look similar.
Doubke jersey j=kniited fabric is more expensive and it corrects most of the problems of the single jersey kniiting. Doubke jersey will not curl, not ladder and is balanced. It will be used for more expensive products in clothing and also in technical fabric such as car seats..