Use the S&K Triangular Adapter to mount an S&K purple martin house onto your existing round pole. This adapter fits over your round 1.25" diameter pole, enabling it to receive your S&K house with its triangular port. Made of plastic, this adapter is a durable, weather resistant converter for your round poles. Made in the USA.

Dimensions: 1.5"W inner section, 1.875"W outer section
Mounting: place on 1.25" outer diameter pole
Construction: plastic