Lift Rings Set #H3000 
My research indicates these Sets are HO scale
           Etched Brass Parts 
for Model Railroad / Scratch Building
originally from Sunrise Enterprises of Doyle CA
etched in 0.008" Spring Temper Brass
limited to stock on hand (starting with 21 Sets)
    discovered in a model parts hoard
Made in USA

Size - Frame is 1.1" x 0.30" containing 
     36 Lift Ring parts inside the frame.  
Size of one Lift Ring - see dimensioned picture
 
I mail orders by First Class Mail with tracking.  
I pack the product with a RIGID support to protect Flatness during transit.  
To open, slit end of envelope, and slide contents out.  Open each layer by slitting tape at sides.  DO NOT FLEX OR BEND.  
In case you want to return the product, you MUST repackage to the same standard as I packed product to you.  Without proper packing, the product will be messed up in transit.     These are precision, delicate parts.   Thank you.