Products  --Single blocks are sold in pairs of one right and and one left hand block.  Double blocks are sold as single pieces.  Standard packaging quantities are noted with each item, but we will ship any quantity that you need.  For pricing, quantity discounts and availability, contact us at openthedoor@frontier.com .  All units are provided with magnet and shock installed, mounting screws, door magnet, door magnet glue and door bumper.