In brief
Choose a controlled assortment, define the buyer and price position for each line, compare complete included scope, and preserve model and packing references for repeat orders.
Design the assortment
Give every line a purpose. Avoid near-duplicate models that create warehouse and sales confusion without adding a clear market role.
Compare complete scope
Include shower heads, hoses, controls, fixings, packaging and documentation in the comparison where relevant.
Build for repeatability
Keep approved model data, photos, drawings, labels and change records so the next order can be checked consistently.