A product display system for the display of products in individual lanes, which comprises - a left side lane member in the form of an L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, - a right side lane member in the form of a reverse L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, and - one or more center lane members , each in the form of an extrusion of plastic material of inverted T-shaped configuration having a vertical divider wall and upper and lower horizontally disposed base elements extending in opposite directions from said divider wall , - said lower base element being formed across a full width thereof on an upper face thereof with a plurality of longitudinally extending alternating grooves and upward projections , - the upper base element of said center lane member being disposed at an elevation above that of said projections and, when joined with a lower base element of an adjacent lane member , being configured to overlie projections of said adjacent lane member, - said upper base element being formed at an outer edge thereof with a downwardly projecting element configured for engagement with a projection or groove of a lower base element of a lane member positioned adjacent to said center lane , - the base elements of said side lane members being configured for engagement with a base element of an adjacent center lane member , - the vertical divider walls of the center lane members being formed on one side thereof with one or more longitudinally extending pusher mounting track elements for the slidable mounting of a product pusher , and - the vertical side wall of one of said left or right side lane members being formed on a side thereof corresponding to said one side of said divider walls with one or more longitudinally extending pusher mounting track elements for the optional slidable mounting of a product pusher . - a left side lane member in the form of an L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, - a right side lane member in the form of a reverse L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, and - one or more center lane members , each in the form of an extrusion of plastic material of inverted T-shaped configuration having a vertical divider wall and upper and lower horizontally disposed base elements extending in opposite directions from said divider wall , - said lower base element being formed across a full width thereof on an upper face thereof with a plurality of longitudinally extending alternating grooves and upward projections , - the upper base element of said center lane member being disposed at an elevation above that of said projections and, when joined with a lower base element of an adjacent lane member , being configured to overlie projections of said adjacent lane member, - said upper base element being formed at an outer edge thereof with a downwardly projecting element configured for engagement with a projection or groove of a lower base element of a lane member positioned adjacent to said center lane , - the base elements of said side lane members being configured for engagement with a base element of an adjacent center lane member , - the vertical divider walls of the center lane members being formed on one side thereof with one or more longitudinally extending pusher mounting track elements for the slidable mounting of a product pusher , and - the vertical side wall of one of said left or right side lane members being formed on a side thereof corresponding to said one side of said divider walls with one or more longitudinally extending pusher mounting track elements for the optional slidable mounting of a product pusher . <EOS>