You are Buying O-ring Kit forSun Joe SPX1500, SPX2500, SPX2598, SPX2599, SPX2700 (Max), SPX3000 XT, SPX3000 XT1-BV 3 Hose to Sprayer Gun.The kit consist a total of 5 o-ring forhose to sprayer gun.This will fix your leak where the hose connects to the sprayer gun.