All colours apart from Black/Grey (JB) are made of heavy duty ballistic nylon material around 1.5mm. The Black/Grey (JB) due to its colour combination is made of thinner (around 1.0 - 1.2mm) standard nylon material. Model: Nylon Strong Attribute: Military, 4/5 rings, For Fixed Lugs, Thin (thickness), Flat, Smooth Length:Regular Length Material: Nylon Closing Type: Buckle, Brushed Stainless Steel, Sewn-in (irremovable) Spring Bars: Included (Buyers should compare the supplied spring bars with the spring bars originally installed on the watch) MEASUREMENTS FOR 18mm WIDTH - Strap Length (excl. the buckle): 275mm Strap Width: 18mm Max Combined Length (to the first hole): 230mm Min Combined Length (to the last hole): 175mm Thickness: 1.5mm Number of Rings: 4 Number of Holes: 9 MEASUREMENTS FOR 20mm WIDTH - Strap Length (excl. the buckle): 275mm Strap Width: 20mm Max Combined Length (to the first hole): 230mm Min Combined Length (to the last hole): 175mm Thickness: 1.5mm Number of Rings: 4 Number of Holes: 9 MEASUREMENTS FOR 22mm WIDTH - Strap Length (excl. the buckle): 275mm Strap Width: 22mm Max Combined Length (to the first hole): 230mm Min Combined Length (to the last hole): 175mm Thickness: 1.5mm Number of Rings: 4 Number of Holes: 9 MEASUREMENTS FOR 24mm WIDTH - Strap Length (excl. the buckle): 275mm Strap Width: 24mm Max Combined Length (to the first hole): 230mm Min Combined Length (to the last hole): 175mm Thickness: 1.5mm Number of Rings: 4 Number of Holes: 9 MEASUREMENTS FOR 26mm WIDTH - Strap Length (excl. the buckle): 275mm Strap Width: 26mm Max Combined Length (to the first hole): 230mm Min Combined Length (to the last hole): 175mm Thickness: 1.5mm Number of Rings: 4 Number of Holes: 9 18mm 20mm 22mm 24mm 26mm Nylon Nato Military Watch Strap Band Heavy Duty Zulustrong Fixed/Standard Lugs Black Grey Blue Green Orange Maroon