Check the listing for details. Squareplug SP400BK Low Profile Right Angle 1/4" (6.35mm) TS/Mono Plug, Black. Color: Black, Condition: New. Listed at 4.09 USD. Square Plug SP400The Square Plug SP400 is currently the world's smallest solder-type pancake connector. It features a very low foot-print without sacrificing strain relief.The low-profile of the Square Plug SP400 allows the connectors to be plugged in directly next to one another, meaning they can be used on pedal switchers and stereo inputs/outputs.The plug is compatible with any 4.6mm cable diameter or less. Mogami W2314 works very well with these plugs.SP400 is compatible with the following popular switching systems: VoodooLab Pedal Switcher, PX8, PX8 Plus, HEX | RJM PBC, Mini Effect Gizmo | MusicomLab 6M, 62M, 8L, MKIV, MKV | Providence Audio PEC-4V, PEC-2 | IdeaBench Switcheroo | Carl Martin Octaswitch, Octaswitch mkii | Vinteck V8 | Cusack Music: PBT9, PBT6 Not Compatible with The GigRig G2 and Boss ES5/8