Rainbow Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart Genuine Rainbow Screw, Size 8-10x.5 - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. This screw fits: Clamp Ring for D3 Clamp Ring for D4 Clamp Ring for D4CSE D4CSE AquaMate Nozzle E Series AquaMate Nozzle