1-1/4" Track x 4' Black Anodized 40-74

Track Size 1-1/4" x 3/16" (32 mm x 5 mm), Track Type: Race, Length 4' (1.2m), Fastener Size 5/16" FH (8mm), Fastener Spacing 4" (102mm), Stop Pin. Dia. 3/8" (10mm), Weight Foot 6.8 oz. (193g), Works with these End Stops 74-36