Comparison : Item # 7730001001, High Recovery Vials - Aluminum Seal Closure
Item # 7730002002, High Recovery Vials - Threaded Closure
Item # 7730001002, Clear Vials Alum Seal – case of 12
Item # 7730002003, Clear Glass High Recovery Vials, 1mL, Threaded
Item # 7730001003, 1mL, Clear Glass High Recovery Vials, Aluminum Seal