Just Trays Fusion JT40 Shower Tray Waste Chrome. Total 'waste' of money. The product was well made but it had a design flaw. On initial assembly, the distance from the underside of the 'upper assembly' (the threaded flanged part inserted in the upper face of the shower tray), to the upper face of the lower seal on the bottle trap, (placed on the underside of the shower tray) is only 20mm. The same thickness as the shower tray. Even with pressure to compress the seal, the internal & external threads between the 2 components would not mate. Unfortunately I did not do a dry run & applied mastic. So the part could not be returned as new. Lessons. Initial assemble without mastic. Buy at your local plumbers merchant so you can 'try before you buy.'