Hellermanntyton heat shrinkable tubing 3 1 kit shrinkit 321 basic 380 03001 hellermann tyton 380 03001 p the hellemanntyton shrinkit basic 321 kit consists of heat shrink tubing assortments in an attractive and handy assembly kit the shrinkit 321 basic kit contains five different sizes of heat shrink with a ratio of 3 1 these products replace many differently sized tubing solutions by fitting almost any heat shrink requirement p p choosing the required product is simplicity itself as