Features： 1、Quick Shrink: Use in conjunction with hot air gun, the tubing enables quick shrinking to flexibly wrap the cable. 2、Good Sealing: Ensuring good sealing, the tube made of safe material is has good durability with acid and alkali. 3、Various Size: Including 385pcs black heat shrink tubing in different sizes, meeting your various working needs. 4、Safe Working: Flame retardant and insulating, the wire shrink wrap set is very safe in electrical application. 5、Easy to Carry: The storage box will keep all the tubes in an orderly way, which largely simplifies the carrying. Specification： Item Type: Heat Shrink Tubing Kit Model: 385 Pieces Set Product Parameter and Specification:  Model(Approx.) Length(Approx.) Quantity Φ1.0mm / 0.04in 40mm / 1.57in 105 Φ2.0mm / 0.08in 40mm / 1.57in 56 Φ3.0mm / 0.12in 45mm / 1.77in 70 Φ4.0mm / 0.16in 45mm / 1.77in 42 Φ5.0mm / 0.2in 65mm / 2.56in 28 Φ6.0mm / 0.24in 65mm / 2.56in 21 Φ8.0mm / 0.31in 90mm / 3.54in 21 Φ10.0mm / 0.39in 90mm / 3.54in 21 Φ12.0mm / 0.47in 90mm / 3.54in 21 Package List： 385 x Heat Shrink Tubing 1 x Storage Box