Viqua QS-463 Replacement UV Quartz Sleeve 5 GPM for S5Q-PA, S5Q and S5Q-GOLD Model No. of Quartz Sleeve: QS-463 Description: Replacement Quartz Sleeve Fits S5Q-PA, S5Q, S5Q-GOLD,SSM-24; 5 gpm units; 20 x 22 x 502 mm (open)