The 'Penthouse' Purple Martin Gourds | S&K Bo Plus Combo SREH 4-Pack USA-Made Colony Gourds

The Experience

Not all martin gourds are created equal — and The Penthouse makes that abundantly clear. Four S&K Bo Plus Combo Purple Martin Gourds in a single pack, each engineered with the kind of specification list that serious landlords recognize immediately as the difference between functional housing and purpose-built colony infrastructure. Attachable porches. Closeable entry covers. A 4" access port with a protective cap. Crescent SREH entrances that physically exclude European Starlings. One-piece construction with a dark, weather-resistant interior that creates the cool, sheltered nesting environment Purple Martins actively seek. And textured white plastic that keeps the interior temperature regulated even during peak summer heat. Built in the USA by S&K Manufacturing — the same team behind some of the most trusted martin housing on the market — The Penthouse is the gourd for the landlord who refuses to compromise on what goes up on their rack.

Scientific Engineering

• Crescent Starling-Resistant Entrance Holes (SREH): Each gourd features a precision crescent-shaped opening measuring 2.25"W x 1.25"H — physically excluding European Starlings while admitting Purple Martins without restriction. Passive, permanent colony protection from the moment of installation.
• Attachable Porches: Included hardware allows a landing porch to be attached below each entrance — providing martins with a stable approach and departure surface that supports natural pre-entry behavior and reduces flight fatigue during high-activity periods.
• Closeable Entry Covers: Included entry covers allow the landlord to close individual gourd entrances as needed — for competitor exclusion during off-season, management of specific compartments mid-season, or controlled re-opening during scout attraction periods.
• 4" Diameter Access Port with Cap: A generously sized 4" access port on each gourd allows the landlord full interior access for nest inspection, parasite management, egg counts, and end-of-season cleanout — without removing the gourd from the rack. An included cap protects the port during active nesting to prevent weather intrusion and nest disturbance.
• One-Piece Construction: The single-body gourd design eliminates seams, joints, and potential failure points — creating a structurally sound, weather-resistant shell that maintains integrity across multiple seasons of outdoor exposure.
• Dark Weather-Resistant Interior: The dark interior finish absorbs less solar radiation than light-colored interiors, maintaining the cooler, sheltered microclimate that Purple Martins actively prefer during nest selection — supporting higher occupancy rates and more stable nesting behavior.
• Textured White Exterior: The textured white plastic exterior reflects solar radiation to regulate interior temperatures during peak summer heat, protecting nestlings from heat stress during the critical development window.
• Base Drainage Hole: A drainage hole at the base of each gourd allows accumulated water to exit freely, maintaining a dry nest interior throughout active breeding season.
• Predrilled Rack Mounting Holes: Holes at the raised top of each gourd accommodate standard rack hanging hardware for straightforward installation on any compatible gourd rack system.

Boutique & Conservation Values

• Premium Colony Infrastructure: The Penthouse represents the upper tier of production purple martin gourd engineering — every feature present is a deliberate colony management tool, not a cosmetic addition. Porches, entry covers, access ports, SREH entrances, and closeable caps together create a gourd that the serious landlord can actively manage throughout the full colony season.
• Scenic Rivers Industries: Your purchase supports S&K Manufacturing's commitment to quality American craftsmanship — the same heritage behind some of the most trusted martin housing available to North American landlords.
• Heritage Manufacturing: Proudly Made in the USA.

Specifications

• Gourd Dimensions: 9.25"L x 9"W x 9"H per gourd
• Entrance Hole Style: Crescent SREH
• Entrance Hole Dimensions: 2.25"W x 1.25"H
• Access Port Diameter: 4"
• Material: Textured Plastic
• Pack Quantity: 4 gourds
• Includes: Attachable porches, entry covers, access port caps, mounting hardware
• Mounting: Rack or hanging mount (rack not included)
• Shipping Weight: 8 lbs.
• Country of Origin: Proudly Made in the USA