Pentair WC19-43 Bottom V Clamp without Nut Replacement for Sta-Rite Posi Flo Cartridge Filter Bottom V clamp replacement Fits with Sta-Rite Posi-Flo pool and spa cartridge filter model T-50TX, T-70TX, T-100TX, T-50TXR, T-70TXR,T-100TXR Nut not included