Seriously good tape
If you think "any ol' electrical tape is electrical tape", this tape will prove you wrong. It's stretchier, more resilient to temperature changes, and longer lasting than cheap stuff by a long shot. Totally worth it in any application that you will be dealing with again. I've used this for a broad range of applications, and it holds up better than cheaper products. Quality adhesive and the tape itself resists becoming brittle and cracking like cheap tape. You won't regret the few extra dollars for the roll.
Pros: Stretchy, durable, UV/temp resistant