Brand: Timoom Product weight: 100g Material: Metal Material: Stainless steel Specification: 38/40/41MM Compatible with Apple Watch series 5 4 40 mm series 3/2/1 38 mm wrist suitable for 7.10 inches-9.80 inches (180 mm-249 mm) wrists. Compatible with Apple Watch 4 44mm series 3/2/1 42mm wrist suitable for 7.10 -9.80 (180mm-249mm) Installation and disassembly are easy. Using a unique double button folding buckle firmly closed to prevent automatic loosening safe and beautiful The retail package includes: 1 strap suitable for Apple Watch + 3 quick release pins + professional removal tool