Qty (4) Ball Studs 13mm, 5/16 X 18 Thread Zinc Color For Lift Supports Struts *** DELIVERED in 3-5 days !!!*** Buyer Beware of counterfeit international sellers, with extended delivery times!! These supports include a 1 year Warranty, and Quick & Easy installation, many models only require a small flat headed screw driver. High Quality Supports, designed to last, to OEM Standards. Displayed shipping rate apply to the contiguous 48 States only. Additional surcharge applies to PUERTO RICO, HAWAII, ALASKA & OTHER US TERRITORIES.. Interchangable with the following OEM Numbers: C1617857,C16-17857,C-bs13-1z,P6700002E,P67-00002E