Type 1: For i phone cable - 0.5meter X 6.35mm diameter double wall white + 0.5meter X 12.7mm double diameter wall white = $2.5 (no pen spring needed)

Type 2: For Samsung cable - 1meter X 12.7mm diameter double wall white = $3.0 (no pen spring needed)

Type 3 : For repair wire - Double wall 6.4mm diameter X 1meter

Note : Double wall heatshrink is thicker than normal heatshrink.