The AquaStar bulkhead cover adapter plate kit is designed for compatible suction applications where a 4 inch opening needs to adapt to a 6 inch cover format. An adapter plate like this is useful because it helps bridge the difference between component sizes, making retrofits and finishing work cleaner and more controlled.This light gray kit is especially useful when the installation calls for a secure transition between bulkhead cover sizes without changing more of the surrounding structure than necessary. It can be a smart solution for update work where fit, presentation, and compatibility all matter.The 4HPAPK103 is a practical adapter kit for compatible AquaStar suction applications that need a cleaner 4 inch to 6 inch transition and dependable cover support. AquaStar bulkhead cover adapter plate kit Adapts 4 inch to 6 inch compatible cover applications Light gray finish Useful for retrofit and size-transition installations Supports cleaner and more dependable cover fitment