1 set of 4 pcs. Easy to install (push-twist on in place of the original door pins) Compatible models: Mercedes Benz E Class W212 E63 AMG Sport, C-Class W204, ML-Class W163 W164 and GLK-Class X204 models. Dimensions: Front door length 1" 7/16 (36mm), Rear door length 15/16. Made in high quality Stainless Steel. PLEASE NOTE: Longer pins are for front door and shorter pins are for rear.