100% new and high quality Material: Plastic Color: Black This product is widely used in electronics, instruments, meters, sensors, communication electronics, smart cards and other fields. Quantity:1pc Size: Style 1. 40*20*11mm inner size 34.5*14.5*8mm; one in and one out 5*6mm oval hole. Style 2. 42*22*12mm inner size 37*16*9mm one in and one out 6 hole Style 3. 42*22*11 can be labelled, the inner size is 37*16*9mm, one in and one out 6 Style 4. 48*26*15mm inner size 44*21.5*12mm one in and one out 6 Style 5. 55*35*15mm inner size 50*30*12mm one in and one out 6 Style 6. 48*26*20mm inner size 44*21.5*17mm one in and one out 6 Style 7. 60*37*17mm inner size 55*32*14mm one in and one out 6 Style 8. 50*28*12mm inner size 45*23*9.5mm one in and two out 6 Style 9. 50*28*21 mm inner size 45.5*23*17mm, one side square hole 6*6mm, one side square hole 14.2*7mm Style 10. 50*28*21 mm inner size 45.5*23*17mm one in and one out square hole 6*6mm Features: 1.Durable and practical 2.Great for electronic projects, power supply units, student projects, amplifiers, etc. Package Included: 1pc Plastic Instrument Case(As your choose) Notice: 1.1cm=10mm=0.39inch. 2.Please allow 1-2mm error due to manual measurement and make sure you do not mind before ordering. 3.Please understand that colors may exist chromatic aberration as the different placement of pictures.