Edgetec Sub Blaster spa pool jet

Edgetec Sub Blaster 1/2" / 15mm Socket Air x 2" / 50mm Spigot - water SVT nozzle. 17 face jet nozzles. 169mm diameter face. Hole size required - 108mm NB - check by dimensions and appearance before purchase. Thes jets are similar to Waterway Master Massage, CMP, and G&G Industries Ultra Blaster jets. None retrofit each other.