Compatibility Work great for pedals whose inputs are at the same height/level 1/4inch (6.3 mm) male to 1/4inch (6.3 mm) male coupler. Compatible for most pedal board.; Material Type These pedal couplers are made of goldplated copper, antiaging, rustproof, solid and durable for long time use.; Compact and Space Saving Smaller than the conventional power cable, save space of pedal board and keep pedals tidy.; Great Signal Transmission Designed for couple guitar pedalboard with equal jack placement, shortening signal chain and ensure low noise, low attenuation and superior signal transmission. Package Included: 4 x guitar pedal coupler connectors;