Slap Happy Weedwackers provide the warm sound of natural gut strings without the high cost and short life span of real gut. Made of a special nylon blend they are nearly indestructible and will last for years! Their larger diameter and lower tension make them easy on the fingers. Great for rockabilly slapping. E -.170 A- .155 D- .105 G- .095 They are long enough to fit 4/4 basses and can be easily trimmed to fit smaller sizes.