Zhejiang Jiuneng Cable Accessories Co., Ltd.,found in 2011, is a company specializing in R & D, manufacturing and sales of LV & MV Cold / Heat Shrink Cable Accessories.
Heat shrink cable sleeves can be customized with printed text, symbols, or color-coding for easy identification and labeling of wires and cables.
https://www.jonean.net/product/cold-shrink-tube-heat-shrink-sleeve/