These are MC4 "X" Branch Connectors. All materials are UL Listed.  One has Three MC4 Male Connectors and One MC4 Female Connector.  The other has Three MC4 Female Connectors and One MC4 Male Connector.  These are used to connect multiple solar panels or groups of solar panels together in a solar field.  The unique design offers greater directional ease in laying out the the branch lines.  The molded in eyelets allow for easy tie wrapping of the branch connectors to the structure. Made in USA. Shipping weight is 8 oz.

Win-Solar does combine items for shipping.  Choose your items and request an invoice before you pay.  OR request a combined shipping quote for the items you would like to purchase.