Here is (1) Sonor L-arm from late 60's early 70's. This item can be used to hold a cowbell or a triangle when used in conjunction with a hoop mount Sonor bracket or multiclamp. 3/8" diameter 4.5" x 5.5".
See my other listings for more Sonor items and check out Drummer Service Center ebay store. Be sure to sign up for current releases. Many items not listed yet , but available. Please feel free to inquire.