Additional or replacement circular base plates adhesive pads for shower tray riser installation kits.Why use this shower tray riser kit Cost of installation - major saving in labour and materials.Unique design of the easy plumb kit allows quick adjustment after settlement.Complies with building regulations particularly when tray fitted above the ground floor.Total stability and support.The circular base plates and feet allow the tray to be levelled quickly and creates a full stress support across the tray.Allows easy installation on uneven surfaces - suitable for stone.This set is for x4 circular base plates (attach to adjustable legs) and x4 adhesive discs (attach to tray underside).