Tonton Kaca
Gelsonlab HSCG-1175 Laboratory Sapphire Double Dome 1.0mm Edge Thick Watch Crystal Concave Tonton Kaca Plain Tonton Kaca Beaker Cover
Saiz 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm, 20.5mm, 21mm, 21.5mm, 22mm, 22.5mm, 23mm, 23.5mm, 24mm, 24.5mm, 25mm, 25.5mm, 26mm, 26.5mm , 27mm, 27.5mm, 28mm, 28.5mm, 29.5mm, 29mm, 30mm, 30.5mm, 31mm, 31.5mm, 32mm, 32.5mm ,, 33mm, 33.5mm, 34mm, 34.5mm, 35mm, 35.5mm, 36mm, 36.5 mm, 37mm, 37.5mm, 38mm, 38.5mm, 39mm, 39.5mm, 40mm (mungkin terdapat perbezaan ± 0.05mm untuk diameter)