Size	Small	Medium/Large
Boot Size	4-8.5 USM	9-12 USM
Weight(lbs/kg)/Pair	4 lbs/1.9kg	4 lbs/1.9kg
Part Number	1130-52-S	1130-52-ML
Base Plate Material	6061-T6 Tempered	6061-T6 Tempered
Rail Material	7075-T6 Tempered	7075-T6 Tempered