<https://hornysdrums.com/products/dw-7000-gibraltar-double-bass-drum-pedal#product>
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"This franken-pedal is made up of a superb DW 7000 main pedal twinned with a Gibraltar slave pedal. Two rock-solid pedals combined to make a superb double bass drum pedal at and equally superb price!\nBoth pedals have been used, so there are signs of use, however both pedals have been cleaned and serviced.\nWorldwide Shipping Available from Horny's Drums."
<https://hornysdrums.com/products/dw-7000-gibraltar-double-bass-drum-pedal>