Inner gap length Outer length Tube top Picture Diameter(mm) Diameter(mm) 4mm 8mm four Our inside reference Inner hole size Outer length Tube peak Color Silver ,gold, rose gold, Antique Brass, Black Nickel Diameter(mm) Diameter(mm) one hundred three 7mm three a hundred and fifty brief 4mm 7 three one hundred fifty high 4mm 8mm 4mm rose gold 2 hundred quick four 8mm 3 two hundred high four 8mm 4 300 quick 5mm 9mm 4mm 300 excessive 5mm nine 4 400 short 6mm 10mm 3 four hundred excessive 6mm 10 four 400 6mm 12mm four 400 6mm 12mm four six hundred quick 8mm 13mm three 600 high 8mm 13mm four 600 8mm 15mm four six hundred 8mm 15mm four 800 quick 10mm 15mm 3 800 high 10mm 15mm 4mm 800 10mm 17mm 5mm one thousand 12mm 19mm 4mm 1000 12mm 22mm 6mm 1200 14mm 22mm 4