Set comprising a pallet (10; 110) as well as one or more trolleys (60; 160) each having a chassis carried and made movable by a drive system, said pallet (10; 110) comprising: - a bottom plate (20; 120) having at least one track (51, 52; 151, 152, 190) extending between a first end (21; 121) of said bottom plate (20; 120) and a second end (22; 122) of said bottom plate (20; 120), which is an opposite end to said first end (21; 121), said at least one track (51, 52; 151, 152, 190) being provided for the movement of a single row of at least one said trolley (60; 160) on said pallet (10; 110); - a first side (11; 111) formed by said first end (21; 121) of said bottom plate (20; 120), a second side (12; 112) formed by said second end (22; 122) of said bottom plate (20; 120) and which is an opposite side to said first side (11; 111), a third side (13; 113) joining said first (11; 111) and second (12; 112) sides and a fourth side (14; 114) joining said first (11; 111) and second (12; 112) sides and which is an opposite side to said third side (13; 113); - a first guide cheek (30; 130) mechanically connected to said bottom plate (20; 120), defining said third side (13; 113); - a second guide cheek (30; 130) mechanically connected to said bottom plate (20; 120), defining said fourth side (14; 114); said first and second guide cheeks (30; 130) being furthermore configured to be able to hold in position said trolley or trolleys (60; 160) guided between said third (13; 113) and fourth sides (14; 114); said set being characterized in that: the first guide cheek (30; 130), having a predetermined first height, is configured to be able to guide a said trolley (60; 160), by its chassis, along said first guide cheek (30; 130); the second guide cheek (30; 130), having a predetermined second height, is configured to be able to guide a said trolley (60; 160), by its chassis, along said second guide cheek (30; 130); said one or more chassis being received on said at least one track (51, 52; 151, 152, 190), guided thereon by said first guide cheek (30; 130) and by said second guide cheek (30; 130), and held in position between said third (13; 113) and fourth (14; 114) sides. - a bottom plate (20; 120) having at least one track (51, 52; 151, 152, 190) extending between a first end (21; 121) of said bottom plate (20; 120) and a second end (22; 122) of said bottom plate (20; 120), which is an opposite end to said first end (21; 121), said at least one track (51, 52; 151, 152, 190) being provided for the movement of a single row of at least one said trolley (60; 160) on said pallet (10; 110); - a first side (11; 111) formed by said first end (21; 121) of said bottom plate (20; 120), a second side (12; 112) formed by said second end (22; 122) of said bottom plate (20; 120) and which is an opposite side to said first side (11; 111), a third side (13; 113) joining said first (11; 111) and second (12; 112) sides and a fourth side (14; 114) joining said first (11; 111) and second (12; 112) sides and which is an opposite side to said third side (13; 113); - a first guide cheek (30; 130) mechanically connected to said bottom plate (20; 120), defining said third side (13; 113); - a second guide cheek (30; 130) mechanically connected to said bottom plate (20; 120), defining said fourth side (14; 114); the first guide cheek (30; 130), having a predetermined first height, is configured to be able to guide a said trolley (60; 160), by its chassis, along said first guide cheek (30; 130); the second guide cheek (30; 130), having a predetermined second height, is configured to be able to guide a said trolley (60; 160), by its chassis, along said second guide cheek (30; 130); said one or more chassis being received on said at least one track (51, 52; 151, 152, 190), guided thereon by said first guide cheek (30; 130) and by said second guide cheek (30; 130), and held in position between said third (13; 113) and fourth (14; 114) sides.