Perfect FitThe pool connection size for skimmer hose B attachment is 3.65" and the plumbing connection for pool vacuum hose B connector is 1.5". The size of pool hose adapter 11238 is precision measured to perform as the original and fits perfectly for intex deluxe wall mount surface skimmer.11238 Surface Skimmer AdapterAbove ground pool skimmer hose adapter is for intex above ground swimming pool surface skimmer. Pool hose B connector for vacuum is used to connect the poolside skimmer hose B to allow water to flow from the skimmer kit to the filter.CompatibilitySkimmer hose adapter replacement is fits for wall-mounted pool surface automatic skimmer models: 28000E, 28335EH, 28337EH, 28341WA, 28345WA, 28365EH, 28375EH, 28395EH. Surface skimmer adapter is also fits for use with the 25016 part number pool hose.High QualityPool Skimmer adapter B for intex is made of high quality PP Plastic, which can withstand high pressure water flow without deformation and breakage. Premium pool vacuum hose B adapter help your Pool Vacuum work better!Great ReplacementIf you have any questions about the use , quality, model or installation of pool skimmer hose B connector, please contact us through Amazon and we will reply to your email within 24 hours.