Specification Brand : American Spa Parts BulletPoint1 : Watch the How To INstall Videoon YouTube look for: VSR Style Jet Nordic Caldera Jacuzzi Premium Spa Hot American Spa Parts How To Install Series BulletPoint2 : 5 1/4" Jacuzzi Premium Retrofit Update Jet Kit BulletPoint3 : Kits Jacuzzi Premium Band Hot Tubs Only ExternallyAssignedProductIdentifier : 3238611912918 ExternallyAssignedProductIdentifier1 : 0740016012467 ExternallyAssignedProductIdentifier2 : 740016012467 ItemName : Jacuzzi Premium Hot Tub Retrofit 5 1/4" Jet Gray Power Pro Spa Video How to ItemPackageDimensions_Height : 13.9 centimeters ItemPackageDimensions_Length : 13.5 centimeters ItemPackageDimensions_Width : 13.8 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : swimming-pool-and-spa-replacement-parts ModelNumber : ASP6540-760 PartNumber : ASP6540-760 ProductDescription : This part is a 5 1/4"JACUZZI Premium Retrofit New Style Replacement Jet Kit. The Kit consists of a New Style Jet and a Glue In Jet Lock Ring. The reason for this Updated Jet is the old style jet has 2 tabs that will break off and the jet will pop out. The new Style jet has a larger tab that holds it into place making the jet stay in and not pop out after a few years of use. This is a JACUZZI Engineered updated Jet. We also offer a Kit with Christies Red Hot Blue Glue in our store. This Part is used in Jacuzzi Premium Hot Tubs only . Please watch the video on YouTube "VSR Style Jet Nordic Caldera Jacuzzi Premium Spa Hot American Spa Parts How To Install Series" and look at the pictures and measurements before ordering to be sure you are ordering the correct part. The original style Adjustable VSR jet is obsolete. This is a new style of the Adjustable VSR jet internal. It includes a new lock ring for retro-fit into existing jet bodies. In order for the new style internal to fit, the new lock ring must be glued into the existing jet body, making sure to align the tab on the lock ring with the slot in the jet body.