Replacement rubber ball seal to fit inside your existing pressure relief device. This part fits the following: Triton Alicante, Triton Amber Iii, Triton Aquatronic 1 Plus Electric, Triton Aquatronic 2 Plus Electric, Triton Aquatronic 2 Ultra Electric, Triton Aquatronic 3 Electric, Triton Aquatronic 3 Plus, Triton Aquatronic 3 Ultra Electric, Triton Aquatronic 4 Plus, Triton Aquatronic 4 Plus, Triton Aspirante (2011-Present), Triton Aspirante Electric, Triton Aspirante Millennium, Triton Aspirante Topaz, Triton Aspirante Xr Electric, Triton Aviva Electric Shower, Triton Belize, Triton Bezique Ii, Triton Biarritz II Electric, Triton Biscay Ii, Triton Cara Electric Shower, Triton Caselona, Triton Caselona Ii, Triton Caselona III, Triton Colourwave Electric, Triton Desire, Triton Enlight, Triton Enrich, Triton Entice, Triton Excite, Triton Inscriptions, Triton Ivory II, Triton Ivory III, Triton Jade Ii, Triton Jade III, Triton Madrid II, Triton Marbella, Triton Millennium Care, Triton Millennium Thermostatic, Triton Opal Ii, Triton Opal III, Triton Passion, Triton Perea Electric Shower, Triton Perluso Electric Shower, Triton Pietra Thermostatic Electric Shower, Triton Prostyle Plus Hairwash, Triton Rapide 3, Triton Rapide 3 Plus, Triton Rapide 4 Plus, Triton Rapide R1, Triton Rapide R2, Triton Rapide R3, Triton Sambada Electric Shower, Triton Seville, Triton Spellbind, Triton T100e Care, Triton T100e Care Plus Electric, Triton T100e Thermostatic Care Electric