Price Shown is per Spool. Must be purchased by increments of 600. 3X24 XCW I/O W/B W/O W/G 600SP Indoor/Outdoor Cross-Connect Wire is intended for cross-connecting points in building entrance enclosures at subscriber s premises and/or in Outside Plant (OSP) enclosures. Each insulated conductor is identified by a combination of solid insulation color, except as noted.