●Compatible with BMW 3 Series E30, E36, E46, E90, E91 and many other models. Please compare with the old one and check the size before purchasing. ●The part reference number is 17111712788. ●The head diameter is 16.5 mm/0.65 inches, the total length from top to bottom is 17.5 mm/0.69 inches and the thread diameter is 10 mm/0.39 inches. ●Made of durable plastic, which is durable and good to use. ●Ideal replacement part for the broken or lost one.