1. It is suitable for H13 bulbs installation. 2. Please check the bulbs model of your car before purchasing. 3. Why need this adapter? Because the LED bulb can't be installed steady when you replace the origin car bulbs, but our adapter is design for solving this problem.Specification: General Bulb Base H13 Material Plastic Product Size 36*32*17mm Package Weight One Package Weight 0.04kgs / 0.08lb One Package Size 20cm * 14cm * 2cm / 7.87inch * 5.51inch * 0.79inch Qty per Carton 200 Carton Weight 7.50kgs / 16.53lb Carton Size 44cm * 42cm * 42cm / 17.32inch * 16.54inch * 16.54inch Loading Container 20GP: 343 cartons * 200 pcs = 68600 pcs40HQ: 797 cartons * 200 pcs = 159400 pcs