Rally racing watch strap was perforated to help with ventilation and breathable for the user. Average thickness around 3.5mm, tapered width narrows down to make it more symbolic. For people with chronograph watches, rally racing straps should definitely be on your top list of choice when looking for new watch straps.
Watch Bands Lookbook demo watches by Strapcode : Citizen NK0002-14W Emerald Green 60 hours Power Reserve , HEUER Vintage Chronograph CALCULATOR Ref-110633, Hamilton Khaki Field H70455733; SEI Automatic Diver' 200m SKXA65K , SEI 6139-7100 Darth Vader Helmet Chronograph; SEI 5 Sports SRPE79 Silver Grey
Item number: 20J16PBU63S6A80 Brand Name: MiLTAT Lug width: 20mm or 22mm Buckle size: 16mm or 18mm Buckle Include: Yes Buckle type/Finish: Polished 316L Stainless Steel Pin Buckle Overall Length: 120mm + 80mm Thickness: Approx. 3.5mm - 2.7mm Spring bar hole dia.: 1.78mm Design to fit: All watches with 20mm or 22mm lug width Material: Nubuck Leather Color/Finish: Dark Grey Stitches color: Black Lining material: leather