The product is a vintage set of 10 KOH-I-NOOR Rapidoguide stencil guide pens, specifically models 3030, 3031, and 3032.
Stencils are in good shape. Each comes in a case. One case is a little cracked but stencil is fine.
2 No. 3032 - Height of Letter 1/4"
2 No. 3031 - Height of Letter 3/16"
1 No. 3030 - Height of Letter 5/32"
3 No. 3030A - Height of Letter 5/64"
2 No. 3030 - Height of Letter 1/8"