The sturdy, thick-walled shrink tubing is highly resistant to mechanical stress. It is resistant to Solvents, acids and alkalis. Because of the high shrinkage rate of the tube is large differences in diameter fits easily. HA47 is coated inside with a thermoplastic adhesive . did Provides reliable protection from moisture and other environmental influences after melting Type: HA47-51/16-1000-BK item: 8 ST.