The S&K Purple Martin Decoy will attract and protect purple martins to your S&K purple martin house or gourds (sold separately). It shows potential tenants there are already martins living in the house or gourd. Brand: S&K Manufacturing Inc. Manufacturer Part Number: PMD Assembled Product Weight: 0.15 lb Manufacturer: S&K Manufacturing, Inc. Model: PMD Assembled Product Dimensions (L x W x H): 7.00 x 2.50 x 2.25 Inches