[STANDARD SIZE - 15 x 15 x 15cm] Each side of the triangular reflector measures 15cm - Refer to dimension images for more information [STANDARD SCREW SPACING - 70mm] The standard screw spacing for all types of trailers is 70cm - our red reflector triangles are the perfect replacement for trailer and tractor reflectors [E-MARKED - SUITABLE FOR ALL TRAILERS] Tested according to IIIA E4 - 02.3537 DOT - SAE - A - 03, these trailer accessories can be used for any type of trailer [REAR - LEFT AND RIGHT] If any of your rear warning triangle reflectors red breaks, you need to replace the right and left trailer reflectors to make sure they match [PACKAGE INCLUDES] 2 Kit reflector trailers, semi-trailers, suitable for motor vehicles such as cars , trucks, tractors, caravans, motorhomes, horse trailers, etc. - NO screws included in the package