Heat Shrink Tube Red & Black D4/W6mm x 1mRed & Black Shrink Tube Set D4mm W6mm 1+1m Set with 1m red and 1m black polyolefin 2: 1 heat shrink tubing suitable for most R C and hobby electrical wires and connectors but also other applications where you need shrink tubing. Specifications: Diameter: 4mm Width (laid flat): 6mm Length: 1+1 m Color: Red & Black Material Thickness: 0. 25 0. 35 mm Material: Polyolefin (PE) Shrink Rate: 2: 1 Radial Shrinkage: 50% Longitude Shrinkage: 5% Shrink