This is an exchanger model with magnets for flange connections. There are 4 magnets for floating head, shell cover, dollar plate connections. There are 8 magnets for channelhead to shell side. I can also engrave any letters onto the side by customer's request for free. This model could be used for education or visual aid purpose.
The dimensions for the item are : 7 1/2"L X 2" W X 2 5/8" H
More detail including a video is at
www.etsy.com/listing/1316684735/floating-head-exchanger-with-magnets?click_key=82d476a71a102856c764b1c78e711d0df33d0507%3A1316684735&click_sum=fb4a88fe&ref=shop_home_active_11