Maytronics US Inc, Dolphin(TM), Screw - M4x14 - 7985-Mtil, For use with: Models: Advantage: 115v Pvc, Plus, Rc Plus, +caddy Swv Cb 2013, Plus Pro Rc Cb 2013, & +remote Control, Deluxe: 115v Pvc, & CL1, 3001+caddy (red & yellow), 3001+caddy Blue, & 2002+caddy 115v Pvc, 3001 115v Cb Bl 2013, Heavy Duty: 115v Pvc, & 115v Cb 2013, Enduro: 11r+Caddy Cb, & 21r+ Caddy-Pvc, Pro: Pro (9999301-SCP), X2 115v Cb, & X2 115v Cb2013 DoLDiag Commander 115v Pvc, Sprite Diag. 115v, DoLDiag Interactive 115v, Scp+Rc 115v, DoLDiag-Explorer, Dyn: Dx5 Plus 115v, & 2002 W Cddy 115v Pvc, Dx5 Battery, Prox Battery, Prox 2 Blue 115v, 2x2: Gyro, 115v cb 2013, & C6 Plus 115 Cb, Evolution X5, C5 Cb, Wave: 300, 50 115v Cb, & 100 Cb