SE 8pcs Jewelers Eye Loupe 30x Loupe + 10X Loupe (4 Ea) The set includes four 10x 21mm chrome loupes and four 30x 21mm chrome loupes The 10x power loupe has a focal distance of 1" (26mm) with 21mm dia lens size The 30x power loupe has a focal distance of 1/2" (13mm) with 21mm dia lens size Made of optical glass and protected when not in use by the swing-out chrome plated metal cover Both loupes come in a protective plastic case