YCA Elite Overflow Box, MediumSmall compactelegant overflow boxes comes in 3 sizes, SM, MD and LG.FeaturesNew slim designComes with lids on both side for quiet operationTemplateincluded1 PVC Pipe includedbulkhead(s) are includedHolesaw drill bit is included,Small overflow external box approximaely 6x3x6″ , internal box approximately 6×1.25×6, can handle up to 90galMedium overflow external box approximately 8x3x6″, internal box approximately 8×1.25×6″, can handle up to 150galLarge overflow external box approximately 12x3x6″, internal box approximately 12×1.25×6″, can handle up to 200gal*** drilling tank is at your own risk ***