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  • Want to take one or two martin houses off telescoping poles and mount them on a pulley-operated system? The Multipurpose pole is made to do just that, allowing landlords to mount two houses on one pole. Consists of a 2" square aluminum pole, heavy-duty steel ground stake, mostly stainless steel har…
  • If you've enlarged your Trio house Compartments from the standard 6" X 6" floors to the roomier 6" X 12" that martins prefer, these blank  replacement doors can be used to close off the back compartment entrance. Fits all Trio models sold by the PMCA. Will not fit other models or brands.…
  • Discourage starlings from entering your Trio martin housing by using either the crescent entrance with a 1-3/16” x 3” entrance hole, or the ExcluderTM entrance with its revolutionary double-peg design. The replacement doors fit Trio Castle, Mini-Castle, Musselman, Grandpa, Grandma,…
  • Starling Resistant Doors for Trio Housing Discourage starlings from entering your Trio martin housing by using  the ExcluderTM entrance with its revolutionary double-peg design. The replacement doors fit Trio Castle, Mini-Castle, Musselman, Grandpa, Grandma, and Wade.  *USE WITH EN…
  • Need to block your housing entrances?  These Foam Entrance Plugs keep House Sparrows and starlings out of nest cavities. Pre-cut flexible foam plugs block any starling resistant or round hole.  Keep the cavities closed until the martins arrive, and later use to prevent premature fledging w…
  • Clamp Kit for Trio MPQ pole 2ea #30052 Carriage Bolt 1ea #42550 Keps Nuts 1ea #20416 Link 1ea #32019 Nylon Insert Nut 1ea #728204 Safety Handle with Bolt : 2ea #20414 A Clamp 1ea #20416 Link 2ea #28024 B Clamp 1ea #32048 Washer 2ea #32042 Rivet  Product instructions…
  • To have the option of removing your entire Trio martin pole from its cement anchor, use one of these ground sockets.   MPS ground socket  fits Musselman poles (MP14, MPQ) and the Castle system (PMC24).  MPS ground socket is 2" OD x 30" long and comes with all har…
  • Original (Round) Doors   These replacement doors fit Trio Castle, Mini-Castle, Musselman, Grandpa, Grandma, and Wade.  Available in 6 packs or 12 packs. FREE SHIPPING  …
  • An ingenious trap-door for catching House Sparrows that replaces any of the doors on all models of Trio brand martin houses or can be rigged to fit on your own homemade, wooden or metal nest-box trap. Simply remove the door the sparrow is using and substitute this trap door. Will not fit Heath, Co…
  • To have the option of removing your entire Trio martin house pole from its cement anchor, use one of these ground sockets.  Trio ground socket is 1-3/4 x 22 inches long and comes with all hardware required to mount your 1-1/2" OD Post. Allows easy removal of entire post. TGS fits Martin…
  • These 2-1/8” diameter aluminum doorstops fit Trio or DuraCraft martin houses only. Sold in packages of 12. Free shipping on this item!  …
  • These handy Trio subfloors raise nests 1/4” above floors for extra drainage. This will keep the nests and nestling martins drier.  Sold in packs of 12.  DN1 is for Trio Safety System 12 MSS12              &…