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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…
  • 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              &…
  • Telescoping pole specifically designed to be used with Trio houses, the MPQ is constructed of heavy galvanized steel. This 3-section telescoping pole has quick-lock clamps and can be eaily raised and lowered by lifting locking handle to loosen clamping members. Adjusts from 5 to 14 feet.  Incl…
  • An effective way to protect martins from large owls and hawks, allowing good martin house management. The guard pivots completely down out of the way to allow landlords access for monitoring. An improved, re-engineered design, the OG1 can be installed on assembled houses, or added during assembly.…