Lay-Z-Spa, Bestway AirJet 'A"B' & 'C' Washer Coupling Seals Kit. Lay-Z-Spa / Lazy Spa / Bestway / Coleman Spa. 1x 'A' washer coupling seal. 1x 'B' washer coupling seal. 1x 'C' washer coupling seal. These seals will fix water leaking from the pipes entering and exiting your pump at the connections/couplings to your hot tub liner pipes.