Tooltec offers replacement rubber tops for MM114160, MM11486 and MM114160K2
Part #MM114160.rt (114 x 160mm) Replacement rubber top includes ball valve
Part #MM11486.rt (114 x 86mm) Replacement rubber top includes ball valve
Part #MM11449.rt (114 x 49mm) Replacement rubber top includes ball valve
Part #MM45160.rt (45 x 160mm) Replacement rubber top includes ball valve
Part #MM114160.K2B (114 x 160mm) Replacement rubber bottom includes metal bars.