Solderless PRO Custom Built Fender Jazz J Bass Wiring Upgrade / Loom / Harness PIO / T-Bleed.. Professional Custom Built harness at an affordable price point. Quality Volume and Tone pots. Gavitt wiring throughout. Switchcraft OR Pure Jack socket. Genuine Vintage Military Russian Paper in Oil Capacitor. Both volume pots fitted with Treble Bleed Resistors Comes complete with template, ready to connect your pickups to! Royal Mail Tracked Post.