Cover of a refrigerator island for the conservation of frozen and/or fresh products, associable with a tub extending in a longitudinal direction and a transversal direction, and provided with a compartment for the products, comprising - a frame comprising at least one longitudinal beam (24, 26) and transversal guides (28a, 28b, 28c, 28d) distanced longitudinally, each guide being provided with at least two overlapping tracks; - on one side: a) a first proximal panel supported by the transversal guides so as to slide in a transversal direction on the first tracks; and b) a second distal panel transversally placed alongside the first proximal panel, supported by the transversal guides so as to slide in a transversal direction on second tracks; the cover being characterized by the fact that it comprises on the side transversally opposite: a) a further proximal panel supported by the transversal guides so as to slide in a transversal direction on the first tracks; and b) a further distal panel transversally placed alongside the further proximal panel, supported by the transversal guides so as to slide in a transversal direction on second tracks; wherein the proximal panel and the distal panel form a telescopic system reciprocally engaging each other on opening and closing, and wherein - in the terminal regional next to the centreline of the tub, the distal panel of one side and the distal panel of the other side have an area in which they surmount each other at least partially, sliding on overlapping tracks. - a frame comprising at least one longitudinal beam (24, 26) and transversal guides (28a, 28b, 28c, 28d) distanced longitudinally, each guide being provided with at least two overlapping tracks; - on one side: a) a first proximal panel supported by the transversal guides so as to slide in a transversal direction on the first tracks; and b) a second distal panel transversally placed alongside the first proximal panel, supported by the transversal guides so as to slide in a transversal direction on second tracks; the cover being characterized by the fact that it comprises on the side transversally opposite: a) a further proximal panel supported by the transversal guides so as to slide in a transversal direction on the first tracks; and b) a further distal panel transversally placed alongside the further proximal panel, supported by the transversal guides so as to slide in a transversal direction on second tracks; wherein the proximal panel and the distal panel form a telescopic system reciprocally engaging each other on opening and closing, and wherein a) a first proximal panel supported by the transversal guides so as to slide in a transversal direction on the first tracks; and b) a second distal panel transversally placed alongside the first proximal panel, supported by the transversal guides so as to slide in a transversal direction on second tracks; a) a further proximal panel supported by the transversal guides so as to slide in a transversal direction on the first tracks; and b) a further distal panel transversally placed alongside the further proximal panel, supported by the transversal guides so as to slide in a transversal direction on second tracks; - in the terminal regional next to the centreline of the tub, the distal panel of one side and the distal panel of the other side have an area in which they surmount each other at least partially, sliding on overlapping tracks.