Here’s a rundown of Tecnifibre squash strings. This is considered one of the premium brands of squash string.
The famous green string from Tecnifibre, which you see many pros playing with. I believe this is supposed to be a multifilament string that gives you the most cut on the ball of all the Tecnifibre squash strings.
It comes in three different gauges — 1.1mm (18 gauge, the thinnest); 1.2mm (17 gauge, the middle guy); and 1.3mm (16 gauge, the thickest).
This is Tecnifibre’s red string. I understand it balances cut and power but also incorporates some materials that are good at retaining tension well over time. It comes only in 1.18mm (18 gauge) thickness.
Tecnifibre is coming out with this black string in 2016. It’s the factory string in the new Tecnifibre Dynergy AP line of rackets, and apparently Mohamed El Shorbagy uses this string.
This is Tecnifibre’s older black string, which is being replaced by the DNAMX string.